I would like to add two notes that might arise once the thread expands. The first is that sin is not measured merely by conduct in scripture. Many people think 1 Jn. 3:4 is the only place sin is defined, and they may, therefore, unwittingly insert an "only" in the verse where it does not actually exist. "Sin is [only] lawlessness," is not what the verse states. The second note is that guilt is not synonymous with shame. When we speak of guilt we usually hear or say something like, "I feel guilty because I did x , and "x" is some form of wrongdoing. Shame usually expressed with something like, "I can't believe I did that. What is wrong with me?" In other words, guilt is the idea I did something wrong while shame is the idea I am something wrong. Both qualify as sin. We do things wrong AND we are something wrong (we are not as God originally made us).