In chapter 20 of The Scarlet Letter, how has Dimmesdale changed physically since his last meeting with Hester?

The narrator says
that

The excitement of Mr. 's feelings as he returned from
his interview with , lent him unaccustomed physical energy, and hurried him townward at a rapid
pace.

Physically, then, Dimmesdale has an incredible
energy that he has not possessed for at least as long as we have known him in the novel. He
moves rapidly instead of languidly or languorously. He, himself, cannot help but recollect how
"feebly" he had walked the exact same ground just a few days prior, comparing the
relative "toil" of that travel to the ease and spryness with which he now moves. He
actually turns pale and tremulous when he encounters the old deacon, as he is so tempted to
utter blasphemous statements which would shock the old man that it costs him a great deal of
energy to keep himself from doing so. In short, the minister seems to have so much physical
energy that it threatens to come bursting out of him in inappropriate
ways.