John 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name.
The Lord promises us power to become sons of God. This is actually a conditional promise : if you receive Jesus and believe on His name, then you have the power to be sons of God.
The Word of God, the Son of God, the Light of God, has come into the world of people that He created. But the world did not receive Him. He came to His own people, the Jews, but they did not receive Him. However, their were some who did receive Him. They received Him into their heart hearts and lives, that is, they believed Him. To those believers He gave power to become sons of God.
All humans, born in sin, are born with the ability and inclination to reject God and the Son who came to save them. To the believers He gives “the capability to control” becoming sons of God. This capacity to receive and believe Jesus is given by God through the Word and the Spirit. And this we do every day when we “remember our baptism” in repentance and faith.
We have no doubt that the Spirit has brought us to faith through the Gospel. Therefore we have no doubt that we are sons (and daughters) of God. As children of God, we have constant access to the Father, we are always accepted and loved by Him, and we can rest secure in the knowledge that He will protect us and care for us all the days of our life. There is no better place to be than in the loving embrace of our Abba Father. We daily become sons of God, and we live another day in paradise, or better, Paradise lives in us.