Energy is spent chiefly on unnecessary and unpleasant emotions, on the expectation of unpleasant things, possible and impossible, on bad moods, on unnecessary haste, nervousness, irritability, imagination, day-dreaming, and so on. Energy is wasted on the wrong work of centers, on unnecessary tension of the muscles out of all proportion to the work produced, on perpetual chatter which absorbs an enormous amount of energy, on the “interest” continually taken in things happening around us or to other people and having in fact no interest whatever, on the constant waste of the force of “attention,” and so on, and so on.

P. D. Ouspensky (1878 – 1947)