“And you, my son Solomon, acknowledge the God of your father, and serve him with wholehearted devotion and with a willing mind, for the LORD searches every heart and understands every motive behind the thoughts. If you seek him, he will be found by you; but if you forsake him, he will reject you forever.” 1 Chronicles 28:9
Are you proud of yourself when you control your mouth and hold your tongue when you want to say something derogatory? The bible says that God know our heart and therefore even when control our speech, what do we do about our hearts? Our behavior always flows from the heart. You might be able to fool others but you can’t fool God.
Fire tests the purity of silver and gold, but the LORD tests the heart. Proverbs 17:3