The great ocean of truth lay all undiscovered before me.

I am ashamed to tell you to how many figures I carried these calculations [of Pi], having no other business at the time

To derive two or three general Principles of Motion from Phænomena, and afterwards to tell us how the Properties and Actions of all corporeal Things follow from those manifest Principles, would be a very great step in Philosophy.

We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.

What goes up must come down.

God created everything by number, weight and measure.

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.