"...the power of this line [the cycloid] to measure time."

"I believe that we do not know anything for certain, but everything probably."

"I do not mind at all that [Newton] is not a Cartesian provided he does not offer us suppositions like that of attract…"

"One finds in this subject a kind of demonstration which does not carry with it so high a degree of certainty as that …"

"I had not thought of this regular decrease of gravity, namely that it is as the inverse square of the distance; this …"

"I esteem his [Newton's] understanding and subtlety highly, but I consider that they have been put to ill use in the g…"

"It's evident God had no design to make a particular Enumeration in the Holy Scriptures, of all the Works of his Creat…"

"These Gentlemen must be told, that they take too much upon themselves when they pretend to appoint how far and no far…"

"There are many degrees of Probable, some nearer Truth than others, in the determining of which lies the chief exercis…"

"A Man that is of Copernicus’s Opinion, that this Earth of ours is a Planet, carry’d round and enlighten’d by the Sun,…"