To watch and witness all our thoughts and to believe in them through acting out, either in a positive way or in a negative manner can only help us as we grow inwardly to allow our minds to dwell on what is of value to us and what is valueless; which is your goal? For one you see as means; the other, end. And one must serve the other and lead to its predominance.
Watch your thoughts; they become words.
Watch your words; they become actions.
Watch your actions; they become habits.
Watch your habits; they become character.
Watch your character; It becomes your destiny.