To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted.
Those who have Christ as Lord of their lives learn to see purity and goodness even in the evil around them. But corrupt people find evil in everything, and even the good they see and hear is colored by the evil in their minds and hearts. What we choose to fill our minds with will affect the way we think and act. What are we choosing to fill our minds with?
When are consciences are in tune with God`s Word it serves as the warning system God intended it to be, but when we allow our minds to become deceived by sin it no longer accurately informs the conscience.
LeRoy Eims on the importance of Scripture memory: "I think two of the master strokes of the devil have been to convince people he doesn't exist, and that Scripture memory is only for children. He remembers the humility of defeat when Jesus Christ, who was tempted in all points like as we are, met him with the Word of God." (What Every Christian Should Know About Growing; p. 26-27)