Again and again one hears from aspirants that in the heat of the day's activity, in the turmoil of the day's business, and under the pressure of the day's work they tend to forget the Quest. At the beginner's stage this is inevitable; he has to attend to these other matters, and if he is to attend to them properly, effectively, and efficiently they need his whole mind. This is why the practice of having withdrawal periods each day for meditation, for study, or for relaxation is so well advised. It is only when a more advanced stage of the quest is brought under consideration that the matter becomes really serious. The aspirant is then trying to practise thought-control as often as he can. He is trying to practise self-awareness and he is trying to practise spiritual remembrance. But still he finds that what he's doing tends to carry his mind away from all these practices so that he forgets the quest. What he has been practising has not been wasted: it will bring its fruit in due course, but it is not enough to give him the success he seeks. The reason is that all this inner activity has been taking place in the realm of thought; he substitutes aspirational thoughts for the worldly ones from time to time. The way out is to deepen both his knowledge of mentalism and his practice of meditation. If he does not do this, he may split his personality and become a mere dreamer.
-- Notebooks Category 2: Overview of Practices Involved > Chapter 9 : Conclusion > # 32