I do not know what I may appear to the world, but to myself I seem to have been only a boy playing on the seashore.

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

I know not how I seem to others, but to myself I am but a small child wandering upon the vast shores of knowledge, every now and then finding a small bright pebble to content myself with while the vast ocean of undiscovered truth lay before me.

Now the smallest Particles of Matter may cohere by the strongest Attractions, and compose bigger Particles of weaker Virture.... There are therefore Agents in Nature able to make the Particles of Bodies stick together by very strong Attraction. And it is the Business of experimental Philosophy to find them out.

Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion.

Errors are not in the art but in the artificers.

Trials are medicines which our gracious and wise Physician prescribes because we need them; and he proportions the frequency and weight of them to what the case requires. Let us trust his skill and thank him for his prescription.