God promises great blessings to Abraham and his offspring, including becoming a great nation, controlling vast lands from the Nile to the Euphrates, and receiving immense wealth and power. These promises are conditional on obedience, as God states that all nations will be blessed through Abraham's seed because he obeyed His voice without question, argument, or rebellion. God fulfills these conditional promises abundantly during the reigns of David and Solomon, granting military dominance, economic prosperity, and control over sea gates and colonies worldwide. The blessings extend to Ephraim and Manasseh, with protection from invasions and multiplication into powerful nations, all because of the original obedience. For first fruits, God offers the conditional promise of eternal life and spirit existence in the Millennium and beyond, requiring belief in the promise, recognition of God working in history and personal life, adherence to laws that protect from harm, and avoidance of quitting or poor choices that lead away from the calling. Failure to meet these conditions results in missing the promise, while obedience ensures God keeps His word as He did for Abraham.

Promises pervade human culture in countless forms, and expectations naturally follow that those who make them will keep their word; when someone fails to do so, it reflects poorly on their character and trustworthiness. This principle becomes especially significant when applied to God, since if He were to break His promises, His very divinity would be at stake—He would become untrustworthy, fickle, and unworthy of faith. Critical scholars and atheists exploit this idea, claiming that God does not keep all His promises and using this as evidence that the biblical portrayal of God is inconsistent or fabricated, particularly by contrasting an allegedly harsh Old Testament deity with a gentler New Testament one. This criticism collapses, however, once the crucial distinction between conditional and unconditional promises is understood. Unconditional promises are fulfilled by God regardless of what the other party does, while conditional promises depend entirely on the other party meeting specific stipulations. The unconditional nature of God's covenant with David illustrates this clearly: God promised through Nathan that David's throne and dynasty would be established forever, a promise reaffirmed in Jeremiah and Psalm 89, where God declares He will not lie to David nor alter what has gone out of His lips. This promise required nothing further from David or his descendants to be fulfilled and can be traced through history toward its ultimate completion in Jesus Christ. By contrast, Deuteronomy 28 presents a conditional promise, where God offers Israel extraordinary blessings—prosperity, health, safety, and national distinction—but explicitly ties these blessings to obedience, repeating the word "if" multiple times. Israel's persistent disobedience meant these blessings were withheld, not because God failed to honor His word, but because Israel never fulfilled the required stipulation. God was under no obligation to bless a people who did not uphold their end of the agreement. This conditional/unconditional framework becomes central to understanding Abraham's sacrifice of Isaac in Genesis 22. After Abraham demonstrated complete obedience by not withholding his son, God swore "by Myself"—since no greater authority existed—that He would surely bless Abraham and multiply his descendants, and that through his seed all nations would be blessed. This oath, examined in Hebrews 6, transformed the promise into something immutable and confirmed, requiring no further proof of Abraham's faith. The promise was now locked in, guaranteed, backed by God's own unchanging character and righteousness. Hebrews emphasizes that God cannot lie, and this oath provides "strong consolation" for believers today, who are called heirs of this same promise. The unconditional guarantee ultimately points to Christ's sacrifice, resurrection, and priestly work, assuring that God will faithfully complete what He has begun in those He calls, provided they continue to seek His Kingdom and righteousness.

The distinction between the Old and New Covenants provides the framework for understanding how promises from God operate under conditions. The Old Covenant, made with Israel, was explicitly conditional in structure: "If you will walk in my statutes, and keep my commandments, and do them; then I will give you rain in due season." This pattern—obedience followed by physical blessing—resembles ordinary human agreements, such as contracts for a home, a car, or a hotel booking, where each party's obligations are spelled out and can be checked against a written record. Deuteronomy 28 expands this same conditional structure, promising national exaltation, agricultural abundance, and victory over enemies specifically "if you shall hearken unto the voice of the LORD." The New Covenant, established upon "better promises," retains conditionality but transforms its nature entirely. Rather than a checklist of external law-keeping, it requires faith in Jesus Christ and a transformation of mind, motive, and character. Jesus deepened the law's demands from outward act to inward principle—not merely refraining from murder but from anger, not merely avoiding adultery but avoiding lust. The condition for receiving the New Covenant's promises is belief on Christ, understood as imitating His way of living, thinking, and acting, and pursuing what Herbert W. Armstrong called "the building of godly character"—a personal, individual responsibility rather than a collective one. Crucially, Romans 3 clarifies that justification cannot be earned through law-keeping; "by the deeds of the law there shall no flesh be justified." All have sinned, so righteousness is imparted by faith alone, as a free gift through Christ's sacrifice. Yet this does not eliminate conditionality altogether—Paul insists faith "establishes" rather than voids the law. The condition shifts from perfect law-keeping to humble, believing acceptance of Christ's sacrifice, followed by a life devoted to fulfilling the law's spirit: loving God with all the heart, soul, mind, and strength, and loving one's neighbor as oneself. The rewards attached to this conditional covenant are far greater than those offered Israel—eternal life, glorification, inheritance of Christ's power and lifestyle, positions of responsibility in the coming Kingdom, and being made like Christ Himself. These promises remain "sure and solid" as long as the individual continues in faith and repentance, exemplified by the assurance that confessed sins are forgiven (1 John 1:9) and that nothing can pluck believers from Christ's hand unless they themselves rebel and depart. Thus the conditionality of promise under the New Covenant is not about earning through works but about maintaining faith, repentance, and Christlike conduct as the ongoing condition for receiving what God has freely offered.