When the impossible has been eliminated, all that remains no matter how improbable is possible.
No man burdens his mind with small matters unless he has some very good reason for doing so.
As a rule, the more bizarre a thing is, the less mysterious it proves to be.
…but it is better to learn wisdom late than never to learn it at all.
Our ideas must be as broad as Nature if they are to interpret Nature.
So tomorrow we disappear into the unknown. This account I am transmitting down the river by canoe, and it may be our last word to those who are interested in our fate.