"Agape" is the New Testament's most distinctive word for love — used 320+ times, often where you would have expected a different Greek word. What it means, how it differs from the other Greek words for love, and why Christian writers chose it deliberately.
John opens his Gospel with one of the most famous sentences in literature: "In the beginning was the Word." The Greek word he uses is Logos. What that word meant in first-century Jewish and Greek thought — and why John chose it — is the doorway into the Gospel of John.