THE FULL ARTICLE — from the International Standard Bible Encyclopedia

The International Standard Bible Encyclopedia (1915), general editor James Orr — public domain, printed whole.

be-hoov': Used in the New Testament for two Greek words dei (Lu 24:26; Ac 17:3) and opheilo (Heb 2:17); the former referring to a physical, and the latter to a moral, necessity (Bengelon, 1Co 11:10). The former means "must," that is, it is required by the order which God has ordained; the latter, "ought," that is, it is required as a debt.