James 2:10-11 (NIV)
10 For whoever keeps the whole law and yet stumbles at just one point is guilty of breaking all of it. 11 For he who said, “You shall not commit adultery,” also said, “You shall not murder.” If you do not commit adultery but do commit murder, you have become a lawbreaker.
Source: What to do with Katie // Are All Sins Equal? | Chris Fabry Live | Moody Radio