Truth is so excellent, that if it praises but small things they become noble.

Having wandered some distance among gloomy rocks, I came to the entrance of a great cavern ... Two contrary emotions arose in me: fear and desire--fear of the threatening dark cavern, desire to see whether there were any marvelous things in it.

The artist sees what others only catch a glimpse of.

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.

I have always felt it is my destiny to build a machine that would allow man to fly.

He who wishes to be rich in a day will be hanged in a year.

While you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.