Our body vomits when it rejects food. There are habits and behaviors that we form that are not healthy. Even after recognizing the unhealthiness, we still return to those behaviors. A faith with Christ requires us to continually renew and better ourselves. Are there any foolish behaviors you continue to return to even when you have already rejected it?
As a dog returns to its vomit, so a fool repeats his foolishness.
~ Proverbs 26:11 [NLT]