Most men imply by their hidden attitude that they know truth; some men even openly assert it. From this they take the next logical step which is always to regard the habits they have established in the past, or allowed to become established, as right ones. Thus the ego justifies its self-indulgences and supports its weaknesses. A habit is accepted by a man only because it is his own habit, even though it is an evil, bad, or unwise one.
-- Notebooks Category 2: Overview of Practices Involved > Chapter 1: Ant's Long Path > # 179