Meaning
Touchstone; the black stone on which gold is rubbed to test its purity.
See it in the verse
Sang-e-Musa in Iqbal’s couplets
Jahan-e-taza ki afkar-e-taza se hai numood
Ki sang-o-khisht se hote nahin jahan paida
Ki sang-o-khisht se hote nahin jahan paida
A new world comes into being from new thoughts — for worlds are not built out of stone and brick.
Action · Aspiration · Awakening
Wahi jahan hai tera jis ko tu kare paida
Ye sang-o-khisht nahin jo teri nigah mein hai
Ye sang-o-khisht nahin jo teri nigah mein hai
Yours alone is the world you yourself create; not this one of stone and brick that lies before your eyes.
Selfhood · Action · Aspiration