Quote of the day (forward-looking edition)

Measure your health by your sympathy with morning and spring. If there is no response in you to the awakening of nature,—if the prospect of an early morning walk does not banish sleep, if the warble of the first bluebird does not thrill you,—know that the morning and the spring of your life are past. Thus may you feel your pulse.

Henry David Thoreau
Journal entry, February 25, 1859

(via the Thoreau blog)