With my blood, I found such joy, taking you away, / My heart went freely, without any measure or fear.

This profound couplet speaks of the painful nature of love and sacrifice. Mir Taqi Mir suggests that the deep joy or emotional satisfaction he drew from his own suffering (his 'blood') was something he could offer to his beloved effortlessly. It implies that the intensity of his pain was so great, it became a freely given, unmeasured gift. It's a masterful expression of self-deprivation in love.