"God is the same God, always and everywhere. He is omnipresent not virtually only, but also substantially; for virtue cannot subsist without substance."

"The best way to understand is by examples."

"To explain all nature is too difficult a task for any one man or even for any one age. 'Tis much better to do a little with certainty, & leave the rest for others that come after you, than to explain …"

"I have studied these things – you have not."

"No great discovery was ever made without a bold guess."