We must keep the emotional issues separate from the intellectual ones. But this is not to say that the intellect is to live an emotion-proof existence. Such separation always needs to be kept up only so long as the lack of it is likely to impair the quest of truth. This danger arises only during the earlier stages of man's seeking. When he has attained a balanced personality, cultivated a serene disposition, and mastered the egotistic urges within himself, then emotion and reason join forces with intuition in producing the quality of intelligence. Henceforth he feels what he thinks and thinks what he feels, his emotions are rightly directed and his thoughts are truthfully formed. They work together harmoniously, satisfactorily, and unitedly.
-- Notebooks Category 6: Emotions and Ethics > Chapter 3: Discipline Emotions > # 3