P.D. Ouspensky
Author: P.D. Ouspensky
Publisher: Vintage (1971)

Q. Is blaming other people a feature? A. It may be a feature. But what is it based on? On lack of understanding. If you begin to study psychology, you find that all causes are in yourself; there can be no causes outside yourself. You do not remind yourself of this often enough. One little part understands that causes are in you, but the larger part continues to accuse other people. At the bottom of every favourite negative emotion you will find self-justification which feeds it. You must stop it in your mind first, and then after some time you will be able to stop it in the emotion too. Lack of understanding is the first cause, lack of effort the second