why should i grieve?

[Salman Al-Farsi]

Why should I grieve because of a thorn?
Once it had made laughter known to me.
Whatever you lost through the stroke of destiny,
know it was to save you from adversity.
One small affliction keeps off greater afflictions;
one small loss prevents greater losses.

~Rumi, from his "Mathnawi"

[witty]

In the dead of night, a Sufi began to weep.
He said, "This world is like a closed coffin, in which
We are shut and in which, through our ignorance,
We spend our lives in folly and desolation.
When Death comes to open the lid of the coffin,
Each one who has wings will fly off to Eternity,
But those without will remain locked in the coffin.
So, my friends, before the lid of this coffin is taken off,
Do all you can to become a bird of the Way to God;
Do all you can to develop your wings and your feathers."

Fariduddin Attar