When a person struggles hard to achieve something.. more often than not that something, in the process, becomes sacrosanct for the person.. and therefore he loses the 'ability to believe' that - that something might not actually be so precious, virtuous or even desirable.

Sometimes, the realisation that you are not in a position to break someone's heart, breaks your heart.

Ik pal jeene ko maut tarasti hai,
maut ki chaahat pe kismat hasti hai.

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(Death struggles to live for a moment,
Destiny smiles at this wish.)