Art is the queen of all sciences communicating knowledge to all the generations of the world.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

I believe there exists, & I feel within me, an instinct for the truth, or knowledge or discovery, of something of the same nature as the instinct of virtue, & that our having such an instinct is reason enough for scientific researches without any practical results ever ensuing from them.

Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.

Every serious scientific worker is painfully conscious ... of being relegated to an ever-narrowing sphere of knowledge.

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, and leave the rest for others that come after you, than to explain all things by conjecture without making sure of anything.