Psalm 19:14- Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.
Notice what the verse says. "Let the words of my mouth (the outward actions) and the meditation of my heart (the condition of the heart) be acceptable in thy sight..." God is concerned with both.
Here is the key. When the meditations of my heart are right, then the words of my mouth will be right as well. Again, the focus should be first and foremost on the condition of our hearts before God. This is the foundation upon which the rest of the Christian life is built.