In this part of our verse, Paul is no longer talking about good things that might become bad things. Now he’s just talking about bad things. The word beset means “to tangle you up.” Can you imagine a person trying to run a race with a long flowing robe entangling him or some rope around his feet? No, he wants to be free so he can run.
What is the sin that so easily trips us up? Weights load us down; sin trips us up. Either one can make you a poor runner and keep you from running the race. In Hebrews 11 and 12, Paul is talking about faith. The whole race we’re running is the race of faith. Hebrews says we live by faith; therefore, we run by faith.
Most of us say, “I wish I had better faith, stronger faith.” Do you know the reason you don’t have more faith than you have? Sin. You say, “Now wait a minute, pastor….” No, friend, the Bible says, “Beware, lest there be in any of you an evil heart of unbelief.”
Unbelief is not a mental sin; it is a moral sin. It doesn’t come out of the head; it comes out of the heart. “Beware, lest there be in any of you an evil heart of unbelief.”