Being God's children, we have to undergo a process, we have to pass some criteria
Matthew 5:44 But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
To be worthy of being a child of God, do all things that Lord Jesus command us to do. You must be after good of other people, we have to always acknowledge the power of God, it will always come to pass either you acknowledge it or not, it will prevail
To be a child of God, you must be selfless
Luke 6:35 But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind unto the unthankful and to the evil.
Proverbs 3:5 Trust in the LORD with all thine heart; and lean not unto thine own understanding.
You must not lean on your own understanding, it is impossible to be child of God and it's not possible to worship God if you do that
Luke 9:23 And he said to them all, If any man will come after me, let him deny himself, and take up his cross daily, and follow me.