What is the literal meaning of the phrase thankfully lets his burden down what is his physical burden in death of a salesman?

The literal meaning of the phrase "thankfully lets his burden down" in "Death of a Salesman" is that Willy Loman has passed away and no longer has to carry the weight of his struggles and failures. His physical burden in the play symbolizes the pressures of living up to the American Dream, providing for his family, and his feelings of inadequacy as a salesman.