It is important for the study of philosophy and especially for the practice of its Short Path to avoid negative thoughts and feelings, to rebut them as soon and as often as they arise. This is not only a moral necessity but also a practical one. Such avoidance helps the mind to reach or keep the delicate condition of intuitive transcendent understanding.

-- Notebooks Category 2: Overview of Practicies Involved > Chapter 4: Practise Mental Discipline > # 89