With insufficient energy, there is sloth, torpor, dullness, and tiredness. When there is excess energy, the mind and body may be restless, agitated, jumpy, strained, tense, and irritable. With excess energy, we may be completely unable to focus at all because we are overemphasizing effort at the expense of focusing on the object of meditation. With insufficient concentration, the mind won't stay with its chosen meditation object and tends to get lost in thought or snagged by stories.
