"Let the words of my mouth and the meditation of my heart be acceptable in your sight, O Lord, my rock and my Redeemer."
- Psalm 19:14 NASB -
Are the words of your mouth acceptable to God? God wants us to speak in such a way that we build others up and glorify His name. Ephesians 4:29 says
"Let no unwholesome word proceed from your mouth, but only such a word as is good for edification according to the need of the moment, so that it will give grace to those who hear."
According to Google, "edification" brings about enlightenment or is uplifting. When we speak, we should be looking at the needs of the moment and speaking words that encourage and improve the people around us.
Grace is unmerited favor, and it is what God has given us. We have done nothing to deserve his Unconditional Love, but He has given it to us anyway. That's grace. Do your words give grace to those who hear them?
Are the meditations of your heart acceptable to God? Philippians 4:8 says:
"Finally, brethren, whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things."
That verse doesn't need any summary. We are to dwell on, or meditate on, things that are excellent and worthy of praise.