For he who said, "Do not commit adultery," also said, "Do not murder." If you do not commit adultery but do commit murder, you have become a lawbreaker.James obliterates the categorization of sins. Right here in the same paragraph where he mentions that something simple, like showing favoritism is breaking the law, he also states that murder and adultery are also breaking the law... And... that if you have broken one part of the law then you are a lawbreaker!
Let that sink in.
We always say that all sins are equal, but do we really believe that? Is that just part of our churchianity mantra, or have we allowed that idea to sink in. This idea is essential for our understanding of our personal need for a savior, but this passage was written to Christians. So, do we as Christians realize our own ongoing sinfulness as we continue to confess and forsake our sins? Or do we continue to think to ourselves that we are "... not as bad as those people..."