Mystical life is not merely a matter of set times only, but is, for other types and temperaments, a matter of constant remembrance and continual thinking which leads in the end to precisely the same result as got by those who practise formal exercises at set periods. I know of mystics who have attained the goal of self-realization without having passed through the formal practice of meditation in the orthodox sense.

-- Notebooks Category 16: The Sensitives > Chapter 1: Mystical Life in The Modern World > # 9