This beautiful poem seems to be a love letter written in the most delicate and profound way. The poet uses vivid imagery to describe how everything in the world, from the crystal moon to the impalpable ash, carries him to the beloved. It's as if the entire universe is conspiring to bring them closer. However, the poet also acknowledges the possibility of love fading away. If the beloved stops loving him little by little, he will do the same. But if the love between them is destined and unwavering, it will burn like a fire that never extinguishes. The poet's love feeds on the beloved's love, and as long as they both live, their love will remain in each other's arms, never leaving. It's a powerful and touching expression of love and its various possibilities.