Hebrews 5:8

Though he were a Son, yet learned he obedience by the things which he suffered;

Though He WAS (a positive fact: not a supposition, as were would imply) God's Divine Son (whence, in His agony, He so lovingly and often cried, Father, ), yet He learned His obedience, not from His Sonship, but from His sufferings. As the Son, He always obeyed the Father's will; but the special obedience needed to qualify Him as our High Priest, He learned experimentally. Compare Philippians 2:6, "equal with God, but ... took upon Him the form of a servant, and became obedient unto death," etc. He was obedient before His passion; but He stooped to a more humiliating and trying form of obedience then [The Greek adage is, Patheemata, matheemata, 'sufferings, disciplinings.'] Praying and obeying, as in Christ's case, ought to go hand in hand.