“Alas! it is not till time, with reckless hand, has torn out half the leaves from the Book of Human Life to light the fires of passion with from day to day, that man begins to see that the leaves which remain are few in number.”
Hyperion, book iv. Chap. viii.
Bartlett's Familiar Quotations, 10th ed. (1919)
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Henry Wadsworth Longfellow 202
American poet 1807–1882Related quotes

“Now Autumn's fire burns slowly along the woods
And day by day the dead leaves fall and melt.”
Autumnal Sonnet; reported in Bartlett's Familiar Quotations, 10th ed. (1919).

Opening lines
The Napoleon of Notting Hill (1904)
Context: The human race, to which so many of my readers belong, has been playing at children’s games from the beginning, and will probably do it till the end, which is a nuisance for the few people who grow up. And one of the games to which it is most attached is called “Keep to-morrow dark,” and which is also named (by the rustics in Shropshire, I have no doubt) “Cheat the Prophet.” The players listen very carefully and respectfully to all that the clever men have to say about what is to happen in the next generation. The players then wait until all the clever men are dead, and bury them nicely. They then go and do something else. That is all. For a race of simple tastes, however, it is great fun.
For human beings, being children, have the childish wilfulness and the childish secrecy. And they never have from the beginning of the world done what the wise men have seen to be inevitable.

The Wearing of the Green, in Arragh na Pogue, or the Wicklow Wedding (1864)
The 5,000 Year Leap (1981)