They don't understand, my friends, on what promise our hearts had laid.

This profound couplet captures the deep anguish of unfulfilled expectations. Mir Taqi Mir is suggesting that the depth of love and the hopes placed upon the beloved by friends (or by the self) are completely misunderstood by the outside world. It speaks to the tragedy of having sincere, heartfelt intentions that are constantly misinterpreted, leaving the lover in a state of profound loneliness and bewilderment.