In the Gospel of John it is recorded that Yeshua said, “I am the way, the truth, and the life” (i.e., ᾽Εγώ εἰμι ἡ ὁδὸς καὶ ἡ ἀλήθεια καὶ ἡ ζωή; John 14:6). The Greek word translated “truth” in this verse is aletheia (ἀλήθεια), a compound word formed from an alpha prefix (α-) meaning “not,” and lethei (λήθη), meaning “forgetfulness.” (In Greek mythology, the “waters of Lethe” induced a state of oblivion or forgetfulness.) Truth is therefore a kind of “remembering” something forgotten, or a recollecting of what is essentially real. Etymologically, the word aletheia suggests that truth is also “unforgettable” (i.e., not lethei), that is, it has its own inherent and irresistible “witness” to reality. In that sense light is a metaphor for truth: “The light shines in the darkness, and the darkness has not overcome it” (John 1:5). People may lie to themselves, but ultimately truth has the final word.
Greek scholars note that the word lethei is derived from the verb lanthano (λανθάνω), which means “to be hidden,” so the general idea is that a-letheia (i.e., truth) is non-concealment, non-hiddenness, or (put positively) revelation or disclosure. Thus the word of Yeshua – His message, logos (λόγος), revelation, and presence – is both “unforgettable” and irrepressible. Yeshua is the Unforgettable One that has been manifest as the Word of God (דְּבַר הָאֱלהִים). He is the Light of the world (אוֹר הָעוֹלָם) and the one who gives us the “light of life” (John 8:12). Though God’s message can be suppressed by evil and darkened thinking, the truth is regarded as self-evident and full of intuitive validation (see Rom. 1:18-21).