Once his understanding is sufficiently mature and once he is achieving the correct results in meditation, the aspirant's progress will be assured and rapid. Before this stage is reached, however, his immediate need is to bring into his everyday life whatever fruits he has so far gathered from his studies. Spiritual growth, like physical growth, is a series of separate growing moments. Just as the child cannot become an adult overnight, illumination, too, is a long, slow process. The aspirant must actually and literally begin to live what he has already learnt; otherwise, he is unwittingly holding himself back, and limiting Reality to the realm of mere theory.
-- Notebooks Category 2: Overview of Practicies Involved > Chapter 5: Balance the Psyche > # 116