"The present state of philosophy is deplorable, and needs to be reformed."

"It is necessary to know the causes of things, and not only their effects, if we wish to have perfect knowledge."

"Theories are of no use unless they can be verified by experiment."

"The true wisdom is not to be found in the books of the Latins, but in the books of the Greeks and Arabs."

"Without the knowledge of Greek, it is impossible to understand the Scriptures perfectly."