Repeat anything often enough and it will start to become you.
Both words and actions, when continually repeated, will begin to shape and form the very essence and nature of who you are, and what you may ultimately accomplish. They can either provide for positive and constructive reinforcement, or negative and destructive reinforcement. Be attentive, and ever vigilant in speaking and acting in a manner consistent with your desires, for they will indeed serve to fashion your destiny.
The words of a [discreet and wise] man’s mouth are like deep waters [plenteous and difficult to fathom]…A [self-confident] fool’s lips bring contention, and his mouth invites a beating. A [self-confident] fool’s mouth is his ruin, and his lips are a snare to himself. The words of a whisperer or talebearer are as dainty morsels; they go down into the innermost parts of the body. He who is loose and slack in his work is brother to him who is a destroyer…A man’s [moral] self shall be filled with the fruit of his mouth; and with the consequence of his words he must be satisfied [whether good or evil]. Death and life are in the power of the tongue, and they who indulge in it shall eat the fruit of it [for death or life].
~Proverbs 18:4,6,7,9,20,21 (Amp)~
Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord. And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him.