If I had not stopped the bloody mountain, the colors of the world would have changed in a moment.

This couplet speaks to the immense, almost cosmic power of profound grief. The poet suggests that his tears are not just personal sadness; they are a force of nature. If he were to release the 'blood-tears' (गिर्या-ए-ख़ूनीं), the very atmosphere and mood of the world would instantly change. It's a powerful declaration that the depth of his sorrow is so overwhelming that it cannot be contained by mere human existence.