The whole object of the Prophets and the Sages was to declare that a limit is set to human reason where it must halt.

You must accept the truth from whatever source it comes.

Consequently he who wishes to attain to human perfection, must therefore first study Logic, next the various branches of Mathematics in their proper order, then Physics, and lastly Metaphysics.

However great the exertion of our mind may be to comprehend the Divine Being or any of the ideals, we find a screen and partition between Him and ourselves. Thus the prophets frequently hint at the existence of a partition between God and us.

How individuals of the same species surpass each other in these sensations and in other bodily faculties is universally known, but there is a limit to them, and their power cannot extend to every distance or to every degree.

You must consider, when reading this treatise, that mental perception, because connected with matter, is subject to conditions similar to those to which physical perception is subject.