Who would set a limit to the mind? Who would dare assert that we know all there is to be known?

Where the senses fail us, reason must step in.

Mathematics is the key and door to the sciences.

Their vain presumption of knowing all can take beginning solely from their never having known anything; for if one has but once experienced the perfect knowledge of one thing, and truly tasted what it is to know, he shall perceive that of infinite other conclusions he understands not so much as one.