God is the Father, you and I are the sons.
28 But what think ye? A certain man had two sons; and he came to the first, and said, Son, go work to day in my vineyard.
29 He answered and said, I will not: but afterward he repented, and went.
30 And he came to the second, and said likewise. And he answered and said, I go, sir: and went not.
31 Whether of them twain did the will of his father? They say unto him, The first. Jesus saith unto them, Verily I say unto you, That the publicans and the harlots go into the kingdom of God before you.
The sons have the ability to do the will of the Father or not.
God's Sons are exclusive to those who were Chosen of the Father in Union with Christ Eph. 1:4-5.
All the rest are not His Sons, but are of their father the devil Mat. 13:38.