In plain words
is simply the mature form of another; therefore they are not mutually opposed. God-inspired knowledge is precisely the mature form of reason itself, so it brings reason to its perfection rather than contradicting it — it reveals matters that reason alone can never reach. Like the mature form that leads to old age, these three faculties strengthen one another.
Innate knowledge is very often paraded before the world as divinely inspired knowledge. Those driven by a restless, unsteady mind, deluding themselves that all their own mental derangement is divine wisdom, come to believe that others must follow them. The root cause of such meaningless teachings being repeatedly propounded in this world is exactly this: the incoherent ravings of the deranged being passed off as divinely inspired. That a teaching not be contrary to reason is the very first test of true teaching, and it is precisely on this foundational principle that all these yogas have been built. Since raja yoga is the attainment of yogic accomplishment through the mind, we need only grasp its central idea. For everyone — from the lowliest of human beings to the greatest of yogis — that single path alone is the refuge. This is called ekāgratā. Whether one works in a research laboratory, walks along a road, reads books, writes letters, or drives a car, one focuses all one's mental powers and examines the physical matter before oneself with that same one-pointed intellect.
Immediately, the essential nature of that matter is laid bare, and the knowledge he was seeking is gained. However great your concentration, to that same degree will the idea become clear to you. The more I concentrate my Prema and my mental powers, the greater grows my power to make my meaning clear to you. And the more this power of concentration grows, the greater becomes the acquisition of knowledge. This alone is the one path to the acquisition of knowledge — whoever one may be, if upon the work at hand one's mental power