The Greek noun eidolon (εἴδωλον) originally meant an image, likeness, or phantom — something that appears to be real but is not. In Jewish and Christian usage it became the standard term for an idol — a manufactured image worshipped as a deity. It appears 11 times in the New Testament and is consistently treated as something empty and powerless, contrasted with the living God.
The New Testament theology of eidolon builds on the LXX translation of the Hebrew elilim (worthless things) and reflects the prophetic tradition's withering critique of idols: they have eyes but cannot see, mouths but cannot speak (Psalm 115). Paul develops this in 1 Corinthians 8:4 — 'We know that an idol (eidolon) is nothing at all in the world and there is no God but one.' Yet idols still pose a spiritual danger not through their own power but through the demonic realities behind them (1 Corinthians 10:19–20). The antidote is not merely intellectual dismissal but the living relationship with the true God who is personally present, powerful, and provably real.