Little memory is good
The past must be understood
It is good to be associated
And sometimes related
It serves so purpose
If more of time passes
With its retention
It needs no personal mention
Past has to be slowly erased
The future has to be raised
On the lapses of past, if any
And it must surely last
The past may give some happiness
If it was glorious
But may surely pain
If permanently remained
Keep it and remember
But not always as desired
It must be used as beacon
To learn and guide falcon
hasmukh amathalal
http://www.poemhunter.com/poem/the-past-may/