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<ref>https://incarnateword.in/cwsa/29/the-newness-of-the-integral-yoga#p7,p8</ref>

Human reason has a double action, mixed or dependent, pure or sovereign. Reason accepts a mixed action when it confines itself to the circle of our sensible experience, admits its law as the final truth and concerns itself only with the study of phenomenon, that is to say, with the appearances of things in their relations, processes and utilities. This rational action is incapable of knowing what is, it only knows what appears to be, it has no plummet by which it can sound the depths of being, it can only survey the field of becoming. Reason, on the other hand, asserts its pure action, when accepting our sensible experiences as a starting-point but refusing to be limited by them it goes behind,[p.60] judges, works in its own right and strives to arrive at general and unalterable concepts which attach themselves not to the appearances of things, but to that which stands behind their appearances. It may arrive at its result by direct judgment passing immediately from the appearance to that which stands behind it and in that case the concept arrived at may seem to be a result of the sensible experience and dependent upon it though it is really a perception of reason working in its own right.