The Bible says that the sons of God are those that have turned from living a sinful lifestyle in the world, to living for God.

"Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you, and will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty." - 2 Corinthians 6:17-18

"For if ye live after the flesh [by its dictates], ye shall die: but if ye through the [power of the] Spirit do mortify [put to death] the deeds of the body [your sinful nature], ye shall live. For as many as are led by the Spirit of God, they are the sons of God." - Romans 8:13-14

The Bible says that if we are God’s sons, we must receive discipline, commands, instruction, and correction (“chastisement”).

"If ye endure chastening [divine discipline], God dealeth with [treating] you as with [His own] sons; for what son is he whom the father chasteneth not [who is never disciplined by his father]? But if ye be without chastisement [If God doesn’t discipline you as He does all of His children], whereof all are partakers, then are ye bastards [then it means you are illegitimate], and not sons [and are not really His children at all]." - Hebrews 12:7-8

We become sons and daughters of God by being born again. (John 3:3).

"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: which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God. [They are reborn—not with a physical birth resulting from human passion or plan, but a birth that comes from God.]" - John 1:12-13

"Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God." - John 3:5

We are born of water by water baptism in Jesus name. We are born of the Spirit by Spirit baptism, receiving the Holy Ghost. (Acts 2:38, Acts 2:4).

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." - Acts 2:38

As sons of God, we shine as lights in the world.

"Do all things without murmurings and disputings: that ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;" - Philippians 2:14-15 [Do everything without complaining and arguing, so that no one can criticize you. Live clean, innocent lives as children of God, shining like bright lights in a world full of crooked and perverse people.]