"If you want to know your true opinion of someone, watch the effect produced in you by the first sight of a letter from him."

"The world is a prison in which solitary confinement is preferable."

"The more I see of men, the more I admire dogs."

"The highest degree of world-weariness is when one has no longer any wish for anything."

"The fundament upon which all our knowledge and learning rests is the inexplicable."