He must develop emotional maturity, strong character, and a courageous attitude toward life. This positive strength is needed to face and master the many different trying situations of existence. The will has to be hardened so that it keeps him from being drowned in the wash of emotional reactions. Only after he has done this can he penetrate through to the deeper layer of being where his inner Self dwells. If this is not done in the early stages of growth he will eventually be forced to retrace his steps and learn, consciously and deliberately, the neglected lessons.
-- Notebooks Category 2: Overview of Practicies Involved > Chapter 5: Balance the Psyche > # 13