I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. (Umberto Eco)

I have not failed. I’ve just found 10,000 ways that won’t work. (Thomas Alva Edison)

The fundamental cause of trouble in the world is that the stupid are cocksure while the intelligent are full of doubt. (Bertrand Russell)