You cannot call yourself a son of God if you do not have the spirit of God. It is the Spirit that gives testimony that we are sons of God. The source of our testimony, our knowledge and our encounter with God is based on the leading of the Spirit of God. Wisdom is the ability to apply knowledge and experience appropriately. Revelation is the insight. It is possible to love God but yet remain spiritually blind. It is not good enough to say I know God, I love God, I come to church; you need to know a bit more about God and have an insight about God.