God knows the heart of man. There is nothing hidden that His Word can not find. A man's words will reveal his thoughts, moreover his character.
We Will Give An Account
"Every idle word that man shall speak, they shall give an account in the day of judgement (Mathew 12:36).
If Its On Your Mind, Its In Your Heart. If Its In Your Heart, Its Going To Come Out Of Your Mouth. "Keep your heart with all diligence; for out of it are the issues of life (Proverbs 4:23).
Keep It Pure; Speak On These Things
"Whatever things are true, honest, and morally upright; speak on these things. "Let your communication be, Yes, yes; No, no; for whatever is more than these comes of evil (Mathew 5:37).