It is.

It is kind
to those too young to understand.
It is cruel
to those who do.
It is merciful
to those who watch.
It is not
to those who feel.
It is devoted
to those who remembered.
It is forgetful
to those who didn't.
It is punctual
to those who were reminded.
It is persistent
to those whose hearts did not need reminding.
It is pretentious
to those who cried for vanity.
It is sincere
to those whom it embraces in the core of one's heart
Grief is.