No man should go through life without once experiencing healthy, even bored solitude in the wilderness, finding himself depending solely on himself and thereby learning his true and hidden strength. – Jack Kerouac
I think that I cannot preserve my health and spirits, unless I spend four hours a day at least — and it is commonly more than that — sauntering through the woods and over the hills and fields, absolutely free from all worldly engagements. – Henry David Thoreau
The great omission in American life is solitude; not loneliness, for this is an alienation that thrives most in the midst of crowds, but that zone of time and space, free from the outside pressures, which is the incubator of the spirit. – Marya Mannes
Psychoanalysis and Zen, in my private psychic geometry, are equal to nicotine. They are anti-existential. Nicotine quarantines one out of existence. – Norman Mailer