Origen

(tom. xx. 15.) This was said, I think, in allusion to some who came without being sent by the Father, of whom it is said in Jeremiah, I have not sent these prophets, yet they ran. (Jer. 23:21) Some, however, use this passage1 to prove the existence of two naturesg. To these we may reply, Paul hated Jesus when he persecuted the Church of God, at the time, viz. that our Lord said, Why persecutest thou Me? Now if it is true, as is here said, If God were your Father, ye would love Me; (Acts 9:4) the converse is true, If ye do not love Me, God is not your Father. And Paul for some time did not love Jesus. There was a time when God was not Paul’s father. Paul therefore was not by nature the son of God, but afterwards was made so. And when does God become any one’s Father, except when he keeps His commandments?