Jesus used the known to teach us about the unknown. Everyone is familiar with the relationship that exists between a father and his child. Through the Lord's prayer our Lord Jesus Christ introduced God to us as our Heavenly Father. Our Lord used this prayer to open our eyes to the nature of relationship that exists between God and us.
It is indeed amazing to be called children of God. If you are wondering how a mortal being can become a child of the Immortal and Eternal God, I refer you to John 1:11-12.
Jesus Christ revealed the secret behind this mystery to Nicodemus in John 3:5-6.
God is Spirit, and once you are born of the Spirit by giving your life to Christ, you become a child of the Spirit and a spiritual being. Having received this endowment, there is an obligation that follows it.
Purity makes us resemble our Heavenly Father, and it is a compulsory virtue for us to manifest. A glorious transformation occurs in us when we become born again! Believe in this transformation and determine to exhibit its character by faith.
The good news is that when you are empowered by God to become His child, He also implants His seed into you to enable you live like Him in this wicked world.