The foundation of Divine revelation rests on absolute truth, standing firm from the very beginning without the need for human investigation or skepticism. Because the source of this truth is eternal, the laws and judgments that flow from it are timeless, remaining stable and valid in every generation.
The primary approach among commentators is that the start of God's speech refers to the revelation at Mount Sinai, specifically His very first declaration, "I am the Lord your God" [אבן עזרא, רד״ק, מצודת דוד]. The opening of His communication is complete truth in and of itself, rather than serving merely as an introduction to what follows [ביאור שטיינזלץ]. There is a fundamental difference between the foundations of the Torah and human thought. While the human mind must often examine falsehood to arrive at the truth, the Torah establishes absolute truth immediately at its inception, such as the reality of God's existence and the creation of the world [מלבי״ם].
Other perspectives view this foundational truth as a reference to the core beliefs of divine providence, reward, and punishment [מאירי], or to the Torah itself, which protects a person in both this world and the next [חומת אנך]. On a historical level, it also reflects God's absolute and unconditional promise to establish the royal dynasty of King David [אלשיך]. Conversely, another approach suggests that it is actually the conclusion of God's speech that proves the truth of its beginning. When the nations of the world heard the initial commandments focusing on God's honor, they assumed He was demanding everything for His own pleasure. However, upon hearing the later commandments dealing with human morality, such as the prohibitions against murder and the instruction to honor one's parents, they retroactively acknowledged that His opening words were also pure truth [רש״י].
Recognizing the absolute truth of the initial command naturally leads to a lifelong commitment to God's eternal laws. These laws are designed to be observed forever, acting as a ladder that elevates a person to truly understand the unity of God [רד״ק]. Because the Lawgiver is eternal, His judgments will never be abolished at any point in time [מצודת דוד]. Unlike human laws, which constantly shift according to the spirit of the age and changing public opinions, Divine justice remains enduring and true across all eras and circumstances [מלבי״ם]. Intertwined with this reality is King David's personal prayer, asking that even when the world must be guided by strict judgment, that severity should always be softened and blended with mercy and charity [אלשיך].