Søren Kierkegaard, Writings
, XXV = Letters and Documents
(Princeton: Princeton University Press, 1979), p. 214 (Letter 150, to Henriette Kierkegaard, 1847, tr. Henrik Rosenmeier):
Above 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.
Friedrich Nietzsche, Twilight of the Idols, Maxims and Arrows
34 (tr. Walter Kaufmann):
The sedentary life is the very sin against the Holy Spirit. Only thoughts reached by walking have value.
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