“I could be bounded in a nutshell and count myself king of infinite space.”

“O God, I could be bounded in a nutshell, and count myself a king of infinite space, were it not that I have bad dreams." Which dreams, indeed, are ambition; for the very substance of the ambitious is merely the shadow of a dream.”

“I understood that I was inventing myself, and that I was doing this more in the way of a painter than in the way of a scientist. I could not count on precision or calculation; I could only count on intuition.”

“When I consider the small span of my life absorbed in the eternity of all time, or the small part of space which I can touch or see engulfed by the infinite immensity of spaces that I know not and that know me not, I am frightened and astonished to see myself here instead of there … now instead of then.”

“Bound in a hollow of space and time, only those truly in need, without harm in their hearts, could find their way to its sanctuary.”

“There is no endless silence of infinite space, for in reality there is no space, no silence and no void.”