“So also Christ glorified not Himself to be made a high priest; but He that said unto him, Thou art My Son, today have I begotten Thee” (Heb. 5:5).
Observe the dignity of the Person called to this office—“Thou art My Son.” The glory of His person is owned in order to [show the perfect competency of] His priesthood. “This day have I begotten Thee” (vs. 5). He was as really a man as any, but without the sinful part (Heb. 4:15).
Yet He was like neither Adam nor us exactly, for Adam had no “knowledge of good and evil”; Christ had—God has. But now men have the knowledge of good and evil, and with that knowledge, sin.
Christ was born of a woman, but in a miraculous way. The spring of [His humanity] was sinless, and yet He had the knowledge of good and evil.
J. N. Darby