A man is rich in proportion to the number of things which he can afford to let alone.
I am no more lonely than the loon in the pond that laughs so loud, or than Walden Pond itself. I am no more lonely than a single mullein or dandelion in a pasture, or a bean leaf, or a housefly, or a bumblebee. I am no more lonely than the Mill Brook, or a weathercock, or the north star, or the south wind, or an April shower, or a January thaw, or the first spider in a new house.
In my walks I would fain return to my senses. What business have I in the woods, if I am thinking of something out of the woods?
Jean-Jacques Rousseau·1782I can only think while walking; as soon as I stop, I no longer think, and my mind only moves with my feet.
Friedrich Nietzsche·1889All truly great thoughts are conceived while walking.
Søren Kierkegaard·1847Above all, do not lose your desire to walk. Every day I walk myself into a state of well-being and walk away from every illness. I have walked myself into my best thoughts, and I know of no thought so burdensome that one cannot walk away from it.
