What are some passages or quotes from the book, The Old Man and the Sea, that show how Santiago has dignity?

I would argue that one of the most powerful moments in
this novella which shows Santiago's dignity in the face of failure is when he returns to
port after he has lost his catch to the sharks, and yet manages to shoulder the mast and
take it back home, in spite of his feelings of complete exhaustion and tiredness and
defeat. Consider how he is described as he steps on land once
again:

He
unstepped the mast and furled the sail and tied it. Then he shouldered the mast and
started to climb. It was then that he knew the depth of his tiredness. He stopped for a
moment and looked back and saw in the reflection from the street light the great tail of
the fish standing up well behind the skiff's stern. He saw the white naked line of his
backbone and the dark mass of the head with the projecting bill and all the nakedness
between.

Note the way that
the skeleton of the fish is a symbol for Santiago's failure. The "nakedness" of the fish
is paralleled by the metaphorical nakedness of Santiago, as he returns, defeated.
However, he still resolutely carries his mast back to his shack, in spite of his
exhaustion and the weight of the mast, showing tremendous dignity in the face of his
suffering and failure.