It is as important to cultivate your silence power as your word power.

No more fiendish punishment could be devised, were such a thing physically possible, than that one should be turned loose in society and remain absolutely unnoticed.

A little cooling down of animal excitability and instinct, a little loss of animal toughness, a little irritable weakness and descent of the pain-threshold, will bring the worm at the core of all our usual springs of delight into full view, and turn us into melancholy metaphysicians.

Marvelous as may be the power of my dog to understand my moods, deathless as his affection and fidelity, his mental state is as unsolved a mystery to me as it was to my remotest ancestor.

It is our attitude at the beginning of a difficult task which, more than anything else, will affect its successful outcome.

Agisci come se quel che fai, facesse la differenza. La fa!

Regarding mutual tolerance: It is negative in one sense, but positive in another. It absolutely forbids us to be forward in pronouncing on the meaninglessness of forms of existence other than our own; and it commands us to tolerate, respect, and indulge those whom we see harmlessly interested and happy in their own ways, however unintelligible these may be to us. Hands off.