George Santayana - Sonnet XXV

As in the midst of battle there is room
For thoughts of love, and in foul sin for mirth;
As gossips whisper of a trinket's worth
Spied by the death-bed's flickering candle-gloom;
As in the crevices of Caesar's tomb
The sweet herbs flourish on a little earth
So in this great disaster of our birth
We can be happy, and forget our doom.

For morning, with a ray of tenderest joy
Gilding the iron heaven, hides the truth,
And evening gently woos us to employ
Our grief in idle catches. Such is youth;
Till from that summer's trance we wake, to find
Despair before us, vanity behind.

George Santayana

http://www.poemhunter.com/poem/sonnet-xxv-2/