A large city cannot be experientially known; its life is too manifold for any individual to be able to participate in it.

The most valuable of all education is the ability to make yourself do the thing you have to do, when it has to be done, whether you like it or not.

It is delightful to read on the spot the impressions and opinions of tourists who visited a hundred years ago, in the vehicles and with the aesthetic prejudices of the period, the places which you are visiting now. The voyage ceases to be a mere tour through space; you travel through time and thought as well.

Complete prohibition of all chemical mind changers can be decreed, but cannot be enforced, and tends to create more evils than it cures.

The ductless glands secrete among other things our moods, our aspirations, our philosophy of life.

A whole population of strangers inhabited and shaped that little body, lived in that mind and controlled its wishes, dictated its thoughts...The name was an abstraction, a title arbitrarily given, like "France" or "England," to a collection, never long the same, of many individuals who were born, lived, and died within him, as the inhabitants of a country appear and disappear, but keep alive in their passage the identity of the nation to which they belong.

In spite of language, in spite of intelligence and intuition and sympathy, one can never really communicate anything to anybody. The essential substance of every thought and feeling remains incommunicable, locked up in the impenetrable strong-room of the individual soul and body. Our life is a sentence of perpetual solitary confinement.