I find the following quote to be true in counseling with most people. We tend to look at the fruit of sin and try to address it, rather than the heart which is the spring from which outward sins come:
"The fatal mistake is to think of sin always in terms of acts and of actions rather than in terms of nature, and of disposition. The mistake is to think of it in terms of particular things instead of thinking of it, as we should, in terms of our relationship to God."
-Lloyd-Jones, D. M. God's Way of Reconciliation - An Exposition of Ephesians 2