Union with God liberates you. You know it when your tendency to sin is gone. While evildoers always scheme and plot to sin, you simply try to do good every present moment. You also experience peace because your thoughts are clean and you no longer think about anything that pulls you away from God. You find all trivial, mundane, phony, impure, worldly thoughts boring or even sickening, for you have seen or experienced the beauty, purity, and holiness of God.