Essence is grasped by rational analysis, as it is separate from change. Rationality sets us apart from other animals, it makes us human. Natural things achieve success in life by fulfilling their function or telos. Unlike animals, we must choose our course and life, so the key human demand is determining the correct choice. God's gifts however are never without their dangers.
Human nature is to be conscious and to desire.
Sons of God, images of God. We are essentially symbolizing beings, makers and readers of signs. Actually no self. God has created the world so that we can return to Him. Success depends upon escaping the karmic cycle of reincarnation.