More on Sonship

Galatians 4

1What I am saying is that as long as the heir is a child, he is no different from a slave, although he owns the whole estate. 2He is subject to guardians and trustees until the time set by his father. 3So also, when we were children, we were in slavery under the basic principles of the world. 4But when the time had fully come, God sent his Son, born of a woman, born under law, 5to redeem those under law, that we might receive the full rights of sons. 6Because you are sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, "Abba,[a] Father." 7So you are no longer a slave, but a son; and since you are a son, God has made you also an heir.

Galatians 4 also lays out some incredible truth concerning the issues of sonship. paul states that as long as an heir is a child, he is not any different than a slave. But, God decided to send forth His Son so that through that Son, many others would be made righteous through His life and sacrifice.

Romans 5:18-20 (King James Version)

18Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life.

19For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.

And through that Promised Seed falling in the ground and dying, the fruit from that is that many other sons of the kingdom would be brought forth thereafter.