Being born again doesn’t keep us from having impure thoughts. First John 1:8 says, “If we say that we have no sin, we deceive ourselves, and the truth is not in us” (KJV). And in Romans 7:15-25, the apostle Paul describes his continuing struggle with sin.
The Bible teaches that all of us have fallen characteristics—a “dark side” that is inclined to sin and rebellion (Romans 7:23; Colossians 3:5)—and it tells us to resist our destructive inclinations and be obedient to Christ (Galatians 5:17-21; 6:8; Ephesians 1:2-6). In this life we will never escape the influence of our old nature, including evil and impure thoughts.
There probably isn’t a single Christian who isn’t ashamed and saddened at the thoughts that sometimes come into his or her mind. If Satan can get us obsessed with the evil thoughts that flash into our consciousness, he can rob us of our joy and keep us from being effective workers for the kingdom of God. This is what Satan tries to do as our adversary (Job 1:7-12), “slanderer,”1 and “accuser” (Revelation 12:10).
Although in this life we will never be completely freed from the taint of sin and impure thoughts, we can grow in our ability to control our response to them. Just because we have a thought doesn’t mean we need to dwell on it or, even worse, commit ourselves to a sinful action because of it. Our goal shouldn’t be to eliminate evil thoughts altogether but to recognize them when they appear and, instead of giving them influence, acknowledging them as sin and rejecting them (James 4:7).
By responding to our evil and impure thoughts with disciplined resistance, we can go a long way towards cleansing ourselves of habitual, willful sin. But we still live in a fallen world and will continue to struggle with our dark side. If we don’t acknowledge this unpleasant reality, we may become drawn into spiritual pride—perhaps the most dangerous sin of all.
