"It is a great pity that there are so few who are interested in the true causes of things."

"I cannot but be astonished that Sarsi should persist in trying to prove by means of witnesses something that I may see for myself at any time by means of experiment. Witnesses are examined in doubtful…"

"It is not necessary to examine all the arguments against a position, but only the strongest."

"I wish to persuade the wise and not to compel them."

"I cannot without great astonishment — I might say without great insult to my intelligence — hear it attributed as a prime perfection and nobility of the natural and integral bodies of the universe tha…"