SIN DARKENS

Sin darkens the understanding, so that man is unable to perceive his real state before God. Satan "hath blinded the minds of them which believe not" (2 Cor. 4:4). The deep-rooted pride of our hearts makes us think the best of ourselves, so that if a question is raised in our hearts, we are ever prone to give ourselves the benefit of the doubt. A spirit of sloth possesses us by nature, so that we are unwilling to go to the trouble which real self-examination calls for. Hence the vast majority of religious professors remain with a head knowledge of the Truth, with outward attention to forms and ceremonies, or resting on a mere consent to the letter of some verse like John 3:16, refusing to "make their calling and election sure." - A.W. Pink, An Exposition of Hebrews