Quote by Pierre-Simon Laplace
"The greatest adventure is not to distant lands, but to the unknown depths within ourselves."
More from Pierre-Simon Laplace
"I had no need of that hypothesis."
"The weight of evidence for an extraordinary claim must be proportioned to its strangeness."
"What we know is not much. What we do not know is immense."
"If we ought to have a fear of anything, we ought to have a fear of want of knowledge rather than of scepticism."