"Our youth we can have but to-day, We may always find time to grow old."

"And what are these same evanescent Increments? They are neither finite Quantities nor Quantities infinitely small, no…"

"It is said, that the minutest Errors are not to be neglected in Mathematics: that the Fluxions are...not proportional…"

"For Science it cannot be called, when you proceed blindfold, and arrive at the Truth not knowing how or by what means."

"In the pursuit of truth we must beware of being misled by terms which we do not rightly understand. That is the chief…"

"For no one's authority ought to rank so high as to set a value on his words and terms even though nothing clear and d…"

"Solicitation and effort or conation belong properly to animate beings alone. When they are attributed to other things…"

"Abstract terms (however useful they may be in argument) should be discarded in meditation, and the mind should be fix…"

"[Tar water] is of a nature so mild and benign and proportioned to the human constitution, as to warm without heating,…"

"Westward the course of empire takes its way; The four first acts already past, A fifth shall close the drama with the…"