The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ... '

The more original a discovery, the more obvious it seems afterwards.

We don't know who discovered water, but we're certain it wasn't fish.

When Thomas Edison worked late into the night on the electric light, he had to do it by gas lamp or candle. I'm sure it made the work seem that much more urgent.

The greatest obstacle to discovering the shape of the earth, the continents and the oceans was not ignorance but the illusion of knowledge.

I do not know what I may appear to the world, but to myself I seem to have been only a child playing on the seashore while the great ocean of truth lay all undiscovered before me.

First doubt, then inquire, then discover. This has been the process with all our great thinkers.

Eureka! (I have found it!)

The great obstacle to discovery is not ignorance; it is the illusion of knowledge.

One doesn't discover new lands without consenting to lose sight of the shore.