Sometimes we are outright rude when we interact with people. We meet a gay guy or a couple living together, and we think we have the obligation and right to warn them what God thinks about their sexuality on our first meeting. As if their sex life is...
Rules are not proof of our spirituality. If anything, they are proof of our sinfulness, a reminder that we have a tendency toward wrongdoing and that we need help.
Sometimes we get way too fixated on how powerful sin is and how weak we are. We worry that if we relax for a second, we'll mess up royally and ruin everything. Ironically, our paranoia only serves to make us more conscious of our sinfulness.