dont erase so lightly

why do you erase memories so lightly from the slate
i have washed it so often
but every time i think, i had cleaned it
soem lines, curved as these are, some sketches,
some drawings appear
which i have not managed to deal with so far
so, now
what shoudl i do ,
shoudl this slate be broken
and should i bury all the pieces of the slate
under the tree near the grave
of a sufi saint
where we had prayed once, for whom, what i dont know know,
but do prayers have to be for a purpose always?