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.
As a child of the Lord one of the most difficult tasks that you will face is to keep your tongue (your words) and your thoughts under control. It is difficult because you constantly have to guard against saying that which will not please the Lord and the devil constantly bombards your mind with wicked thoughts.
However, this verse gives you great encouragement. In this ongoing battle, your Redeemer, Jesus Christ, is the One who gives you the strength that you need to be victorious. Will it always be easy? NO! But you can do all things through Christ who strengtheneth you!