The essence of thought is perfect clarity. The movement of thought creates conflict, but when you investigate the nature of the subject, you find that the essential character of thought, even bad thought, is still perfect clarity. It is clean clear, like a mirror, and reflects even irritating objects. Therefore, when even bad thoughts come, don't get upset, don't cry, and don't criticize yourself-instead, use the technique of simply being aware; just contemplate the clarity of the subject, your own mind. If you do that, it will again become clear, because clarity is its nature. Similarly, when good thoughts come, instead of getting busily distracted by the object, again contemplate the clarity of the subject, your own mind. Lama Yeshe (Från Introduction to Tantra)