Here is an excerpt from my book, The Silent Master: Awakening the Power Within:
When you do this shower meditation to eliminate negative thoughts and feelings, you are taking action to form an empty cup attitude. Remember, however, that to become empty does not mean you become a void. In fact, the process of sacrificing your negative traits is best carried out through positive affirmation, not through negation. Instead of saying, “I am not sad,” you say, “I am full of natural joy belonging to the consciousness of my Silent Master.” Your empty cup will be filled by your positive declarations about your true self.