Revelation in Christian theology expresses the significant self-disclosure of God to man. The Gk. language possesses various terms and expressions relevant to this process. apokalyptō, a compound word formed from kalyptō (→ hide, conceal) and apo (from), carries with it the idea of unveiling something previously hidden. dēloō, derived from dēlos, clear, manifest, calls more attention to the goal, i.e. that as a result something becomes known and manifest. epiphaneia, from the root