Homologia appears 6 times in the NT (2 Corinthians 9:13; 1 Timothy 6:12, 13; Hebrews 3:1; 4:14; 10:23). It comes from homologeō (G3670), 'to say the same thing, agree, confess,' combining homos (same) + legō (to say). Homologia is the Christian's public declaration of agreement with God's word about Christ. Hebrews calls Jesus the 'apostle and high priest of our homologia' (Hebrews 3:1) and repeatedly urges believers to 'hold fast to the homologia of our hope' (Hebrews 4:14; 10:23).
Homologia in the NT is both an initial act (the public confession that Jesus is Lord, Romans 10:9-10) and an ongoing posture (continuing to hold and declare the faith). The Hebrews passages are particularly striking: in a context of persecution and temptation to return to Judaism, the author urges believers to 'hold fast' (kratōmen) their homologia — not to waver, deny, or shrink back. This suggests homologia was tied to public worship, possibly to formal baptismal confessions or creedal declarations used in early Christian gatherings. The 'faithful saying' (pistos logos) passages in the Pastoral Epistles may reflect similar liturgical confessions.