Galatians 4: 4,5 NIV
But when the set time had fully come, God sent his Son, born of a woman, born under the law, 5 to redeem those under the law, that we might receive adoption to sonship.
The verses above states that our Master Yeshua the Messiah was born under the Law to redeem those who are under the Law - that we may receive adoption as sons.
What does being under the Law actually mean? Does "sonship" mean we are no more "under the Law"? Does it mean we are no longer under obligation to keep the commandments of the Torah (Law)?
Further on, in Galatians 4:7, the Apostle states that, after receiving the Spirit of His Son into our hearts, we are no longer a slave, but instead have become a son.
Young's Literal Translation puts it across very effectively, using the original sentence structure:
Galatians 4: 4-7 YLT
4 and when the fulness of time did come, God sent forth His Son, come of a woman, come under law,
5 that those under law he may redeem, that the adoption of sons we may receive;
6 and because ye are sons, God did send forth the spirit of His Son into your hearts, crying, `Abba, Father!'
7 so that thou art no more a servant, but a son, and if a son, also an heir of God through Christ.
Towards the latter part of chapter 4, beginning from verse 21, the Apostle appeals to those desire to be "under the Law" to consider the typological meaning of Ishmael, born of the maid servant (slave), in contrast to Isaace, born of the free woman, Sarah, born by the promise of God, concluding in verse 31:
"then, brethren, we are not a maid-servant's children, but the free-woman's"