Philippians 2:5-7

5 Have this mind among yourselves, which is yours in Christ Jesus, 6 who, though he was in the form of God, did not count equality with God a thing to be grasped, 7 but emptied himself, by taking the form of a servant, being born in the likeness of men.

Talk about it:

Where was God the Son before he was born as a man? (God the Son lived together with God the Father and God the Holy Spirit in heaven.)