Psalm 1 is an instructional psalm that, together with Psalm 2, introduces the first book of Psalms. It has no superscription, and the two psalms share the words haga, derek, and ashre. Psalm 1 sets out the theme of two kinds of people, the righteous and the wicked, on two paths with two ends. The blessed man does not walk in the counsel of the ungodly, stand in the path of sinners, or sit in the seat of the scornful. The Hebrew plurals for the wicked and the singular for the righteous man show that the righteous will be a small minority, as Jesus warned of the narrow gate in Matthew 7. The movement from walking to standing to sitting marks a deepening slide into sin. The righteous man delights in and murmurs (haga) over God's torah day and night. Torah here means all of God's instruction and the lessons learned from it, not the Pentateuch or legalism. He is like a tree transplanted by streams of water, called out of the world by God, bearing fruit, with a leaf that does not wither, a hint of eternal life. The ungodly are chaff blown away, unable to stand in the judgment or the congregation of the righteous. In verse 6, God knows and provides for the way of the righteous, while the way of the ungodly perishes. Going one's own way, apart from God, is self-destruction. Jesus' Beatitudes open His ministry just as "Blessed is the man" opens the Psalms.

Psalm 1 sets out two kinds of people on two paths with two outcomes, and it serves as the first half of the introduction to Book One of Psalms. The blessed man does not walk in the counsel of the ungodly, but delights in the law of the Lord, meaning all of God's instruction, and meditates on it day and night, constantly mulling over how to apply it, grow in it, and overcome what holds him back. He is like a tree transplanted beside rivers of water, set in good soil and fed by the nourishment of God's Spirit, so that it bears fruit in season, its leaf does not wither, and whatever he does prospers. The withering-free leaf points to eternal life, which John 17:3 defines as knowing the Father and the Son. The ungodly walk a self-made path, devised by themselves and flawed. They are like chaff or a tumbleweed driven by the wind, will not stand in the judgment, and will be burned up. The Lord knows, watches over, and guides the way of the righteous, but the way of the ungodly perishes. Going one's own way ends in self-destruction; one must walk with God. Psalm 1 stresses keeping God's Word in mind, with torah as its key word, while Psalm 2 focuses on knowing the Anointed Son. Instruction and Messiah belong together as the Word in the Book and the Word as a Person. Both psalms are framed by "Blessed," and they form a single introduction.

Psalm 1 introduces Book One of the Psalms with the first of its two great themes: the Hebrew Torah, God's instruction. Torah is not merely the Pentateuch, the Ten Commandments, or any particular set of laws or covenant, but all the instruction God gives. That includes the New Testament and the lessons learned through living out His instruction. Sometimes the law is understood not when it is read in black and white but when it is practiced repeatedly and its promised fruits are seen, which makes it heartfelt and heart-believed. Psalm 2 supplies the companion theme, the Messiah, the anointed Son, who is the perfect Model of all that instruction and the Person to whom it points. Together the two psalms form a two-pronged fork: the Word as written instruction and the Word as the Person, the Logos. Both are known through instruction and through relationship, and both run through all 150 psalms and the whole Bible. Psalm 1 and Psalm 2 are unattributed, so their writer or editor is unknown, but they set these themes at the head of the Psalter. Psalm 19 reflects them in reverse order, moving from the Creator to the law. Faith in God is the natural response to having His instruction and a relationship with the Son.

Psalm 1 belongs to the category of wisdom psalms, a genre in which the psalmist provides godly counsel on how an upright person should live in a world estranged from God. Identified in the material as "Blessed and Happy is the Man," Psalm 1 stands among the core group of wisdom psalms most consistently recognized by scholars, alongside Psalms 37, 49, 73, 112, 119, 127, and 128. Like the other wisdom psalms, it exhibits the three defining characteristics of the genre: it is addressed to people rather than functioning primarily as a prayer to God; it centers on the contrast between right doing and wrongdoing; and it highlights the blessings that flow from godliness as opposed to the curses that follow sinfulness. Within this framework, Psalm 1 is specifically noted for the confident, unqualified manner in which it expresses God's teaching. Together with Psalm 112, it presents divine instruction along with its rewards for obedience and its punishments for rejection in a straightforward, assured tone. This sets it apart from psalms such as 37 and 73, which, while ultimately affirming godliness, work through doubt and question the apparent prosperity of the wicked before arriving at a declaration of faith. Psalm 1, by contrast, does not wrestle with such uncertainty; it lays out the two paths—the way of the righteous and the way of the wicked—with clarity and conviction. This confident presentation fits within the broader pattern of wisdom psalms, which offer general principles about righteous living rather than absolute guarantees. Although Psalm 1 asserts blessings for the righteous and negative consequences for the wicked, such outcomes should not be understood as functioning on a simple, mechanical cause-and-effect basis in every individual life. Virtue does bring reward and wickedness generally ends in disaster, but this may not be visible in the present life; the ultimate fulfillment of these blessings and curses often belongs to the resurrection and God's Kingdom rather than to temporal circumstances. God reserves the right to work out His purposes in ways that are not immediately apparent, and the righteous or wicked may not experience the full measure of reward or punishment within their earthly lifetimes. Thus, Psalm 1 exemplifies the essential purpose of the wisdom psalms: to instruct God's people in practical, applicable terms about walking in His ways versus walking in rebellion. It reinforces the broader biblical understanding of wisdom as more than intellectual knowledge or understanding—it is the practical application of God's instruction in daily life, what has been described as "skill in living." Just as Psalm 128 defines the fear of the Lord as walking in His ways, and Psalm 112 defines it as delighting in His commandments, Psalm 1 contributes to this same wisdom tradition by contrasting the blessed man who follows God's instruction with the wicked who reject it. Its confident declaration of two distinct paths—one leading to blessing, the other to ruin—serves as a poetic and memorable summary of the broader message found throughout the wisdom psalms: that true wisdom consists in fearing God and applying His instruction faithfully in everyday life, trusting that ultimate reward and judgment rest securely in His hands.

The material presents Psalm 1 as a direct parallel to the description in Jeremiah 17 of the man who trusts in the LORD and becomes like a tree planted by waters. This man rejects the counsel of the ungodly, the path of sinners, and the seat of the scornful, choosing instead to separate himself completely from human customs and ways of living that contain no thought of God. His delight lies in the law of the LORD, which encompasses the total way of life God teaches, including the application of love and service in human relations, the use of time, and the handling of physical possessions. Meditation on this law day and night produces genuine joy because it reveals the beauty and wisdom of living according to God's understanding. As a result, the man is like a tree planted by rivers of water that brings forth fruit in its season, whose leaf does not wither, and whatever he does prospers. This imagery underscores full access to the living waters of God's Word through spoken and written instruction, enabling the individual to absorb nourishment without limit except personal capacity. Such rooting allows correction of the heart, replacement of stony attitudes with a soft and loving one like God's, and preparation for the Kingdom of God, where obedience and service bring the promised prosperity in every endeavor.

Psalm 1:1-3 presents a foundational picture of the blessed man, first defining him by what he does not do before showing what he becomes. The passage identifies three negatives to be avoided: walking in the counsel of the ungodly, standing in the path of sinners, and sitting in the seat of the scornful. This reflects a twofold progression—one in mindset, moving from being unmindful of God (ungodly), to actively sinning (sinner), to knowingly and mockingly sinning in God's face (scornful); and another in action, moving from walking, to standing, to sitting, each stage representing a deeper entrenchment in sin while still allowing opportunity to turn away until the final choice to sit is made. In contrast to this path, the blessed person delights in the law of the Lord, meditating on it continually. Because of this choice, he is compared to a tree planted by rivers of water, one that produces fruit, does not wither, and prospers. The word translated "law" can also mean instruction, suggesting the tree's roots reaching toward that instruction, which is identified as God's Word and His Holy Spirit. This tree imagery connects to Jeremiah 17:7-8, which expands upon Psalm 1 by describing a more mature tree—one that has grown through instruction to develop trust and hope in the Lord. While Psalm 1 emphasizes that the tree will not wither, suggesting it may still be stressed by trial, Jeremiah's tree does not even fear the heat when it comes; its leaves remain green and it is not anxious even in drought. Similarly, Psalm 1 speaks of fruit produced "in its season," a future expectation, while Jeremiah states the tree "will not cease from yielding fruit," indicating one who has already been productive and continues to be so. Together, these passages suggest Psalm 1 may depict a newer or younger believer choosing to depart from ungodliness and follow instruction, while Jeremiah 17 depicts one long established in trust and hope through sustained obedience. Central to both passages is the fact that the trees are planted beside rivers of water, pointing to the Source of both the planting and the water itself. This Source is identified as the Lord, the giver of instruction and living water, referenced in John 7:37-38, where Jesus proclaims Himself as this source of living water in whom trust and hope may be placed. This tree symbolism ultimately connects to Isaiah 61:2-3, which speaks of comforting those who mourn and giving beauty for ashes, so that they may be called "trees of righteousness, the planting of the Lord, that He may be glorified." This ties the entire tree motif to God's purpose of transforming His people into flourishing, righteous beings—rooted in His instruction, sustained by His Spirit, and ultimately reflecting His glory as part of His plan to expand His family.