“Uncertainty is the refuge of hope.”

“It is not what he has, nor even what he does, which directly expresses the worth of a man, but what he is.”

“Conquering any difficulty always gives one a secret joy, for it means pushing back a boundary line and adding to one's liberty.”

“Philosophy means the complete liberty of the mind.”

“I begin to realize that my memory is a great catacomb, and that below my actual standing-ground there is layer after layer of historical ashes. Is the life of mind something like that of great tree...”

“Our duty is to be useful, not according to our desires but according to our powers.”

“We kill all the caterpillars, then complain there are no butterflies.”

“Where ignorance is our master, there is no possibility of real peace.”

“You can be used by someone for their aims when you are not aware of your true being”

“Knowledge, like air, is vital to life. Like air, no one should be denied it.”

“Science is organized knowledge. Wisdom is organized life.”

“I definitely learned a lesson this time. I know that I can be broken. I am not as tough as I thought. I see it now. At this point, it's the only thing good that came out of all of this. I know myse...”

“Just as in the body, eye and ear develop as organs of perception, as senses for bodily processes, so does a man develop in himself soul and spiritual organs of perception through which the soul and...”

“The most perfidious way of harming a cause consists of defending it deliberately with faulty arguments.”

“An ordinary mirror is silvered at the back but the window of the night train has darkness behind the glass. My face and the faces of other travellers were now mirrored on this darkness in a success...”