All Christians became Sons and Daughters of God when they were saved, or born again. But it takes a revelation of the Holy Spirit to ever really know you are a son or daughter of God. If we live in fear, we are living as a slave instead as a Son or Daughter of God. Once we can be healed of a wrong view of God and start seeing God as He really is, (a loving father), then we can experience the security and the love of a child of God. We need to learn our place in Christ, we have a seat at the heavenly dinner table, and most Christians live in the back of the property in the slave quarters, instead of in the presence of our Heavenly Father. It begins with a revelation of who God is and who we are. Then we are to grow into a mature manifested Son of God, but we can never grow into the intimacy with God that He desires until we see that we are really His child.