Next step of my Soul

Came across this interesting poem written by a Persian Sufi mystic poet Jalal al-Din Muhammad Rumi.
I died as inanimate matter and arose a plant,
I died as a plant and rose again an animal.
I died as an animal and arose a man.
Why then should I fear to become less by dying?
I shall die once again as a man
To rise an angel perfect from head to foot!
Again when I suffer dissolution as an angel,
I shall become what passes the conception of man!
Let me then become non-existent, for non-existence
Sings to me in organ tones, 'To him shall we return.'

These are words from his poem Masnavi.