The conclusions to which reason comes can only have obligatory force upon the reason itself, not necessarily upon the whole integral being of man. We are finally to decide the problems of life by the integration of all our human nature and not merely by the judgement of a particular part of it. To make life a matter only of rational concepts about it is to reduce it, is to make a cold abstraction from it, and thus to fall into the fallacy of taking the part for the whole. Metaphysical concepts may fully satisfy the demands of reason but this does not mean that they will therefore satisfy the demands of the totality of our being. They satisfy reason because they are the products of reason itself. But man is more than a reasoning being. His integral structure demands the feeling and the fact as well as the thought. Hence it demands the experience of nonduality as well as the concept of it, the feeling as well as the idea of it. So long as he knows it only with a limited part of his being, only as empty of emotional content and divorced from physical experience, so long will it remain incompletely known, half-seized as it were. It is at this crucial point that the seeker must realize the limitations of metaphysics and be ready to put aside as having fulfilled its particular purpose that which he has hitherto valued as a truth-path.
-- Notebooks Category 7: The Intellect > Chapter 1 : The Place of Intellect > # 168
-- Perspectives > Chapter 7: The Intellect > # 36
