"On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow."
"Thoughts are the shadows of our feelings - always darker, emptier and simpler."
"He who has a why to live can bear almost any how."
"Perhaps I know best why it is man alone who laughs; he alone suffers so deeply that he had to invent laughter."
"I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage."
"Is man one of God's blunders? Or is God one of man's blunders?"
"Some are made modest by great praise, others insolent."
"Many a man fails as an original thinker simply because his memory it too good."