God’s holiness lies at the very heart of the need for discernment. Our passion for God’s holiness, our desire to keep ourselves pure from sin, will motivate our practice of discernment. The greater our understanding of God’s holiness, the greater will be our understanding of the importance of discerning truth from error. We will desire to cast off all that is wrong so that we can be unsullied, unspoiled by sin.
Tim Challies