The third commandment forbids taking the name of the LORD in vain. This prohibition encompasses both swearing falsely by that name and profaning it through speech or conduct that brings dishonor upon God. It extends to any behavior in which a person claims the identity of God's people yet acts in ways that associate infamy with Him. The commandment does not specify a particular pronunciation or restrict the use of God's name to Hebrew terms alone. Rather, it addresses the manner in which His name, representing all that is known of His character and works, is employed. Many names and titles appear throughout Scripture, each revealing aspects of who He is, and these may be used in worship without regard to the language in which they are expressed. Insistence that only certain Hebrew forms are acceptable adds to the commandment and elevates a single detail into an object of devotion. Such an approach mirrors other extremes that convert a commandment into an idol, fostering self-righteousness while obscuring the need to amend one's ways and obey God from the heart. In this way the commandment's intent to guard against vain or dishonoring use of the divine name is itself profaned when the rule is pressed beyond what God has stated.

Profaning God's name falls under the broader biblical concept of being "profane," a term rooted in the Latin profanus, combining pro- (against or away from) and fanum (temple). To profane something is to remove it from the sphere of the temple—that is, from the true worship of the true God. This applies not only to obscene language, which is the narrow modern usage of the word, but to people, behaviors, and even sacred objects that are far from what God designates as holy. Among the things God explicitly warns against profaning is His own name, and this warning carries the same gravity as His warnings concerning His Sabbaths, sanctuary, altar, and ordinances. God's seriousness about this issue stems from the fact that His designations of clean and unclean, holy and unholy, define His very nature and character. Just as a parent instructs a child in right and wrong so that the child grows to reflect the parent's values, God instructs His people in what is proper and what is profane so they will mirror His own character. To be indifferent to these divine distinctions is to be indifferent to God Himself. The scattering of Israel among the Gentiles is directly tied to the profaning of God's Sabbaths, which brought His fury and judgment upon them (Ezekiel 20:15-24; 22:6-16). Yet even after being scattered, the people continued to profane God's name, a pattern that Ezekiel 36:16-38 and 39:7-8 indicate persists into the present. This demonstrates that the profaning of God's name is not merely a past historical failure but an ongoing issue among God's people. Ezekiel 44:23-24 points to a future time when God's priests will teach His people to discern between the holy and the unholy, the clean and the unclean, and will properly hallow His Sabbaths. However, the present reality is better described by Ezekiel 22:26, which reveals that holiness is not something transferable through mere association, while uncleanness—and by extension, profanation—can spread through contact. Being near a holy person does not make one holy, but contact with what is profane contaminates and renders one's efforts unfit for God's service. Ultimately, God requires those He calls into His service to be holy because He is holy, and to carefully distinguish between the holy and the profane. This distinction, including the guarding of His name from being profaned, is essential to truly knowing Him, for His name embodies His nature, character, and worship, and any disregard for its sanctity reflects a deeper disregard for God Himself.