"It is not good to be too free. It is not good to have all one wants."

"The eternal silence of these infinite spaces frightens me."

"Man is equally incapable of seeing the nothingness from which he emerges and the infinity in which he is engulfed."

"We run heedlessly into the abyss after putting something in front of us to stop us from seeing it."

"We are so presumptuous that we would like to be known by all the world, and even by people who will come after us when we are no more."