And yellow sash
"Were famed from Yezd to Yezdikhast.
I taught what space and learned what mud is.
My metaphysics were my past.
Alas, I left my lust till last
Of all my studies.
"I kept my mind so clear and keen
By grinding guesswork into saws,
You scarce could fit a meal between
The triumphs of my thought-machine,