What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.

"Theologians talk about a prevenient grace that precedes grace itself and allows us to accept it. I think there must also be a prevenient courage that allows us to be brave - that is, to acknowledge that there is more beauty than our eyes can bear, that precious things have been put into our hands and to do nothing to honor them is to do great harm."

The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.

Overfishing will only turn the ocean into a desert, we must learn restraint.

"A literatura é a arte de expressar a alma através das palavras."