When someone attains deep concentration within that melody, whose eyes and heart will not become equally focused and captivated?

This couplet beautifully describes the mesmerizing power of deep concentration. It asks, when someone is so utterly absorbed, with their heart fully focused and unwavering, who could possibly remain unaffected? It suggests that the sheer intensity of such genuine devotion or artistic immersion is so powerful that it naturally draws in everyone who witnesses it. Their eyes and hearts too become captivated, reflecting the same profound focus. It's about how true dedication creates an irresistible pull, making others align with that singular, heartfelt energy.