en_tn/gal/01/16.md

to reveal his Son in me

Possible meanings are 1) "to allow me to know his Son" or 2) "to show the world through me that Jesus is God's Son."

Son

This is an important title for Jesus, the Son of God. (See: rc://en/ta/man/jit/guidelines-sonofgodprinciples)

preach him

"proclaim that he is God's Son" or "preach the good news about God's Son"

consult with flesh and blood

This is an expression that means talking with other people. Alternate translation: "ask people to help me understand the message" (See: rc://en/ta/man/jit/figs-idiom)