God's grace is very simple. God extends grace, undeservedly, to the world because it is His nature. According to John 3:16 He loved so He gave of Himself. If someone says they love and don't give of themselves they are not walking in God grace. They might be walking in what they think is grace, but it is not God's grace. "By God's grace you are saved....." He also put a stipulation on His Gift of His Son: One must believe in His Son in order not to perish.
"Only Christ is the fullness of God's revelation." Everyday Hunter
