The eyes overflowed, and from the lesson, understanding emerged. The light of this union sustained the homeland.

This couplet beautifully suggests that when our eyes shed tears—perhaps from deep understanding or a profound lesson learned—a powerful transformation occurs. These aren't just tears of sadness, but possibly of realization or spiritual connection. This experience, described as the 'light of union' or 'noor-e-vasl', signifies a moment of ultimate clarity or spiritual merging. And from this very light, this profound insight and connection, comes a dedicated offering or support to one's homeland. It implies that true enlightenment or deep personal experience should ultimately inspire selfless service and strength for our nation.