One of the scarier components of remaining sin is its deceitfulness. It is a reality that is vital to acknowledge and confess. Sin blinds. You see, you and I are in possession of two vision systems. There are our physical eyes that enable us to see the physical universe that surrounds us, and there are the eyes of our heart that help us “see” the spiritual realities that are vital to see if we are going to be who we were designed to be and do what we were designed to do. Sin plays havoc with our spiritual vision. Although we are able to see the sin of others with specificity and clarity, we tend to be blind to our own. And the most dangerous aspect of this already dangerous condition is that spiritually blind people tend to be blind to their blindness (Paul Tripp, Dangerous Calling, p. 34).