The Greek word aletheia

Found in every New Testament book except First Thessalonians, Philemon, Jude, and Revelation, the Greek noun “aletheia” described “truth.” Jesus was described as someone who taught the “true” ways of God (Mt. 22:16) because He was “full of truth” (Jn. 1:14). Jesus said those who want to offer acceptable worship to God must worship in “truth” (Jn. 4:24).

The devil offers lies instead of “truth” (Jn. 8:44), but it is only the “truth” that “frees” people (Jn. 8:32; 1 Tim. 2:4). Now people are “sanctified by the truth (Jn. 17:17; 1 Pet. 1:22), but some who are told the “truth” refuse to believe it (Jn. 8:45). Jesus said the Holy Spirit would guide the apostles into “all the truth” (Jn. 16:13) and this body of truth now exists (compare Jude 3).

Some seek to “change the truth of God into a lie” (Rom. 1:25) while others refuse to “obey the truth” (Rom. 2:8) and thus receive “condemnation” (2 Thess. 2:12). Those who do not keep God’s commandments are classified as a “liar” and said to not have the “truth” (1 Jn. 2:4). The saved “walk in truth” (2 Jn. 4), “love in truth” (3 Jn. 1), and “rejoice” (1 Cor. 13:6) with the “truth.”