Man can do what he wills, but he cannot will what he wills.
Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest.
Bad books are intellectual poison; they destroy the mind.
He who cannot find himself the retreat of his own soul, let him appeal to solitude — if he can even bear himself.
Never did I think so much, never did I realize my own existence so much, never was I so much alive, so much myself, as in those journeys which I made alone and on foot.
I find it wholesome to be alone the greater part of the time. To be in company, even with the best, is soon wearisome and dissipating. I love to be alone. I never found the companion that was so companionable as solitude. We are for the most part more lonely when we go abroad among men than when we stay in our chambers. A man thinking or working is always alone, let him be where he will... The really diligent student... is as solitary as a dervish in the desert. The farmer can work alone in the field or the woods all day, hoeing or chopping, and not feel lonesome.