An unbelieving smile flits on your
eyes when I come to you to take my
leave.
I have done it so often that you
think I will soon return.
To tell you the truth I have the
same doubt in my mind.
For the spring days come again
time after time; the full moon takes
leave and comes on another visit,
the flowers come again and blush
upon their branches year after year,
and it is likely that I take my leave
only to come to you again.
But keep the illusion awhile; do
not send it away with ungentle
haste.
When I say I leave you for all
time, accept it as true, and let a
mist of tears for one moment deepen
the dark rim of your eyes.
Then smile as archly as you like
when I come again.

Rabindranath Tagore

http://www.poemhunter.com/poem/the-gardener-xl-an-unbelieving-smile/