“Architecture, of all the arts, is the one which acts the most slowly, but the most surely, on the soul.”

“Children have to be educated, but they have also to be left to educate themselves.”

“Too often we forget that genius ... depends upon the data within its reach that Archimedes could not have devised Edison's inventions.”

“The happiness of most people is not ruined by great catastrophes or fatal errors but by the repetition of slowly destructive little things.”

“Men of lofty genius when they are doing the least work are most active.”

“Neither a lofty degree of intelligence nor imagination nor both together go to the making of genius. Love, love, love, that is the soul of genius.”

“There's a fine line between genius and insanity. I have erased this line.”