Keep back Your servant also from presumptuous (arrogant, conceited, rash) sins; Let them not have dominion over me.
Then I shall be blameless, and I shall be innocent of great transgression. Let the words of my mouth and the meditation of my heart be acceptable in Your sight, O LORD, my strength and my Redeemer.
Psalm 19:13-14 (NKJV)
(These words were used by King David and he reflected up the words he spoke and the thoughts passing through his mind – meditation is the act of thinking about something carefully, calmly, seriously, and for some time, or an instance of such thinking an extended and serious study of a topic).