Commentaries:
Robertson's Word Pictures (NT)
For (gar). The reason for the previous statement that no prophet starts a prophecy himself. He is not a self-starter.
Came (hnexqh). First aorist passive indicative of ferw (verses II Peter 1:17 f.).
By the will of man (qelhmati anqrwpou). Instrumental case of qelhma. Prophecy is of divine origin, not of one's private origination (idiav epilusewv).
Moved by the Holy Ghost (upo pneumatov agiou feromenoi). Present passive participle of ferw, moved from time to time. There they "spoke from God." Peter is not here warning against personal interpretation of prophecy as the Roman Catholics say, but against the folly of upstart prophets with no impulse from God.
Other Robertson's Word Pictures (NT) entries containing 2 Peter 1:21:
Mark 4:34
Acts 1:16
Acts 8:35
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