True worship must be in spirit and truth (John 4:24), which means it starts with God and the revelation of Scripture rather than with human reasoning, tradition, or felt needs. Because God is Spirit, He is not worshipped through human inventions, and He rejects worship that mixes pagan customs with the holy. Christmas, Easter, and Halloween are the chief examples: their syncretistic pagan roots make the whole a lie, and God hates lying (Proverbs 6:16-19). Israel's golden calf and the "feast to the Lord" Aaron proclaimed, along with Deuteronomy 12:29-32's command not to worship God as the nations worship their gods and not to add to or take away from His commands, show that sincere intent cannot sanctify borrowed paganism. Jeremiah 7 shows the same danger in trusting "lying words" while professing to worship in the Temple, and Mark 7 shows that teaching human commandments as doctrine makes worship vain. Two principles anchor true worship. First, one must start with God, not with self, since false religion is popular because it gives people what they want. Second, one must accept what God has revealed in Scripture and in Jesus Christ, who is the truth and the only way to the Father (John 14:6). Believing that God exists is not enough, since even demons believe. Worship that comes from truth yields the fruit of the Spirit, as in God's seven holy days of Leviticus 23, whereas worship drawn from the world's customs yields the works of the flesh (Galatians 5). Those who are of the truth hear Christ's voice, and God's Word supersedes all human tradition.

Worshipping God in spirit and in truth means worshipping Him the way He prescribes, not adopting pagan practices and baptizing them with Christian meaning. Christmas is the test case. Its date and trappings long predate Christianity and center on sun-worship, so Christianizing it is not true worship but idolatry, which replaces the worship of God with a false form. God warned ancient Israel against copying Canaanite ways even under the pretext of honoring Him, and He forbids adding to or taking away from His instructions (Revelation 22:18-19). The Bible never gives instruction or example for celebrating Christ's birth, never says when He was born, and never indicates that birthday celebrations please God. Christ's rebuke applies: people who honor Him with their lips while their hearts are far from Him worship in vain, teaching the commandments of men as doctrine and nullifying God's word through tradition (Matthew 15:8-9; Mark 7:9, 13). Human nature rebelliously does what it wants even when God says otherwise (Romans 8:7). Satan, following C.S. Lewis's observation that he sends error in pairs of opposites, sets secularists who reject God against Christians who accept syncretism. Both positions are lies, and Satan wins either way.

God is Spirit, and those who worship Him must worship in spirit and truth. He would not command the observance of something rooted in falsehood. While the world devotes immense energy to holidays lacking truth, searching for purpose in them, those called by God are set apart to learn and grow in His truth. We are guided by His holy days, which align us with His will and reveal the coming Kingdom. It is our responsibility to guard this calling, to hold our ground, and to protect our families from worldly influences, ensuring that our worship remains in spirit and truth.

Worship acceptable to God requires both godly sincerity and truth, as zeal and fervor alone prove insufficient and even dangerous when disconnected from divine knowledge. The Jews of the first century illustrate this failure, possessing abundant zeal for God yet remaining ignorant of His righteousness and therefore establishing their own standards instead of submitting to His. Their sincerity, though genuine from a human perspective, lacked the guidance of truth and produced only futile efforts that could never justify them before God. The same error persists today whenever sincerity is exalted above knowledge, allowing people to pursue religious practices and holidays whose origins and customs contradict scriptural commands. Such worship, however earnest, amounts to following human traditions rather than the explicit instructions of God and results in self-righteousness rather than the righteousness He requires. Godly sincerity, by contrast, flows from purity of motive and freedom from hypocrisy; it is sincerity tested and directed by truth, comparable to unleavened bread that symbolizes moral and doctrinal purity. This form of sincerity enables believers to conduct their lives with simplicity and uprightness, motivated by love rather than selfish ambition or ulterior aims. Because truth determines the proper goal and direction, sincerity energized by truth leads to the kingdom of God, while sincerity without truth wastes energy, fosters deception, and ultimately separates people from the salvation they claim to seek. The necessity of aligning zeal with revealed truth therefore remains absolute for any worship that truly honors God.

Worship is a primary biblical reason for going to the Sabbath services and the Feast, and God is seeking those who will worship Him in spirit and truth (John 4:23-24). The Greek proskuneo and Hebrew shachah picture bowing down in reverence, yet worship is chiefly a matter of the heart: a bowed-down head and heart of total, unconditional surrender. Lip service is vain when the heart is far from God (Matthew 15:8; 7:21-23). Such worship becomes a constant attitude of humility that makes everything done either an act of worship or of desecration, though there are also specific times, like the Sabbath and Feast, to worship pointedly. True worship begins when a person becomes aware of God's awesome presence, as with Moses, Joshua, Job, the man born blind, and Thomas. Without seeing, knowing, and surrendering to God, worship in spirit and truth is unlikely, so believers can ask Him to reveal Himself. Practically, this means praying and singing with heart and gusto, attending services as though God Himself were visible, and showing reverence in dress, punctuality, attentiveness, and conduct, whether in a hall or a home. God is present at His worship services, and honoring His presence means never doing anything that would grieve Him.

True worship of God is presented as flowing directly from sound doctrine and from a right understanding of the church as the spiritual Body of Christ. Because pagan worship, such as that practiced in ancient Rome, reduced religion to mere ritual performance—where correct ceremony mattered more than sincere belief—true Christians are called to a fundamentally different standard. Jesus declared unconditionally that the Father must be worshiped "in spirit and in truth," rejecting hypocrisy and empty form. Since God is Spirit, those who worship Him must do so with heart and mind fully engaged, not merely through external observance. This worship must be sincere, arising from gratitude, praise, and prayer, and marked by a genuine desire to glorify God rather than to be seen. Spiritual worship means offering the heart and mind to God for His use, not seeking personal spectacle. Hebrews 10:19-23 reinforces this by urging believers to draw near with a true heart in full assurance of faith, having consciences cleansed and bodies washed, holding fast to the confession of hope. Gathering for worship with the congregation is therefore essential to the faith, signifying that God is present among His assembled people. Only illness or genuine distance excuses absence, and even then, a family should strive to have a representative present, reflecting an understanding once commonly held that congregating before God's throne carries real significance, not something to be treated casually simply because online access exists. What is believed in the mind and felt in the heart must be expressed in action, "not in word or in tongue, but in deed and in truth." Obedience to what God has already revealed is the key to receiving further understanding, since God builds His people incrementally, teaching them by building on what they already know. Under the new covenant, God's law is not merely external but written on the heart, so that human nature's rebellion against obedience is transformed by the Holy Spirit, which gives new desires and makes serving God a joy rather than a burden. To revere God's name means honoring Him with the whole heart, so that work, relationships, finances, and desires all align with His will, not worship confined to formal gatherings alone. This worship is inseparable from doctrine, for false teaching inevitably devastates while sound doctrine shapes right attitudes and conduct. Believers are called to contend earnestly for the faith once delivered to the saints, holding fast the pattern of sound words, since doctrine that accords with godliness stands opposed to those who turn away for personal gain or itching ears. Ultimately, worship in spirit and truth is bound to the believer's identity as a member of Christ's spiritual body, uniting sincere inward devotion with faithful outward practice, all grounded in and inseparable from Christ, who is Himself the truth.

Worshipping God in spirit and in truth is incompatible with having other gods, so it rests on keeping the first commandment. God desires unswerving devotion to Him alone. Joshua called Israel back to commitment after years of sporadic worship of other gods, and such wavering cannot coexist with the fear of God and sincere service to Him in truth. Anything held as more important than God is an idol, and whatever a person serves is his god. Every person either delights in God and His Law and serves Him all day long, or serves his own lusts. Seeking first God's Kingdom and His righteousness is fundamental to this devotion. Divided loyalty is no loyalty, because no one can serve two masters. Career, home, family, hobbies, television, or even medicine can enslave a person, so that he pleases them or himself and fails to give God pure devotion. Seeking to please men instead of God also corrupts worship, and worship shaped by the traditions of men is vain. Reliance on doctors in place of God for healing is one example of idolatry, since true healing comes from the Creator and whatever is not of faith is sin. Jesus models true worship by submitting wholly to the Father's will, even to the giving of His life, and by rebuking Satan with the command to worship and serve God only.

God's people worship Him in spirit and in truth and in love, in flagrant contrast to the world, which celebrates pagan holidays in flesh, lies and lust. Jesus said His followers would worship the Father in spirit and truth, not in flesh and lust. Worship in truth cannot mix pagan customs with the worship of the one true God. God warned Israel in Deuteronomy 12:29-31 not to inquire how the nations served their gods and do likewise, for He hates every abomination they practiced. Paul likewise teaches in I Corinthians 10:19-21 that what pagans sacrifice they sacrifice to demons, and no one can drink the cup of the Lord and the cup of demons. Valentine's Day descends from the Roman Lupercalia, a lust festival tied to Lupercus, Venus and Cupid. The church syncretized it by renaming it for a saint, but its pagan character remained. Some reason that holidays once pagan have become purely secular and so are harmless, but this ignores God's command in Deuteronomy 12:2-4 to eradicate every vestige of paganism, not merely keep it out of His worship. Worship is not confined to a service; the whole of life is to honor God, and all that is thought, said and done should glorify Him. Enjoyment is good, but never independent of Him. Truth must be spoken in love, not lust.