"I can calculate the motion of heavenly bodies, but not the madness of people."

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

"I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier sh…"

"My powers are ordinary. Only my application brings me success."

"Nature is pleased with simplicity, and affects not the pomp of superfluous causes."