From my ashes and blood, you have brought forth this world; what is the proof of my witness, and the splendor of my youth?

This profound couplet by Allama Iqbal speaks of the ultimate price of creation and sacrifice. The poet suggests that the very existence of this world required the ultimate offering—his own dust and blood. Therefore, he questions the value of mere worldly proof or witness (the 'bond of a witness') when compared to the eternal, everlasting brilliance and glory. It's a powerful meditation on self-sacrifice versus eternal truth.