Analysis:
This quatrain by Saadi Shirazi is a profound exploration of the transience of life and the overwhelming power of love.

The Transitory Nature of Life: The poet suggests that life is fleeting and can be lost in a moment. The image of selling "a hundred sheaves of joy for sorrow" highlights the ease with which happiness can turn to sadness.
The Power of Love: The poet is willing to sacrifice everything, even life itself, for love. The image of "kneeling in dust" emphasizes the humility and devotion of the lover.
The Paradox of Existence: The quatrain presents a paradox: the poet is willing to give up everything for a momentary pleasure. This paradox highlights the irrationality of love, but also the profound impact it can have on our lives.

Themes:

The transience of life: The poet emphasizes the fleeting nature of human existence.
The power of love: Love is depicted as a force that can overcome all obstacles, even death.
Sacrifice: The poet is willing to sacrifice everything for love.
The paradox of human existence: The quatrain presents a paradox about the human condition.

Deeper Meaning:

This quatrain is a powerful statement about the human condition. It suggests that love is the ultimate motivator, and that we are willing to risk everything for it. The poet's willingness to sacrifice life itself for love highlights the intensity and depth of human emotion.

This quatrain is a reminder of the fragility of life and the enduring power of love. It suggests that love is the only thing that truly matters, and that we should cherish it above all else.