Proverbs 15:23

All the ways of a man are clean and innocent in his own eyes (and he may see nothing wrong with his actions), But the Lord weighs and examines the motives and intents (of the heart and knows the truth).

The Holy Spirit in us is our best defense against sin.  The Holy Spirit will give our spirit a nudge when we may be doing or saying something that doesn’t align with God’s best.  When we keep our hearts soft and sensitive to His leading, we can maintain peace in our lives.