What plea of Hester’s arouses sympathy and admiration in Chillingsworth? (chapter 14) Nathaniel Hawthorne's The Scarlet Letter

As Hester Prynne speaks in confidence to her former
husband in Chapter XIV of The Scarlet Letter, Roger Chillingworth
asks her,

readability="19">

"And now what wouldst thou with me touching this
man?"

"I must reveal the secret," answered Hester firmly. 
"He must discern thee in thy true character.  What may be the result I know not.  But
this long debt of confidence, due from me to him, whose bane and ruin I have been, shall
at length be paid.  So far as concerns the overthrow or preservation of his fair fame
and his earthly state, and perchance his life, he is in my hands....nor do I perceive
such advantage in his living any longer a life of ghastly emptiness, that I shall stoop
to implore thy mercy.  Do with him as thou wilt!  There is no good for him,--no good for
me,--no good for thee!  There is no good for little Pearl!  There is no path to guide us
out of this dismal
maze."

This response of
Hester expresses her sense of looming fate upon her and Arthur Dimmesdale.  She feels
since she and the minister and Pearl and Chillingworth, are doomed by fate, Dimmesdale's
sin may as well be exposed and Chillingworth may as well do as he wishes to the
minister, for thy are fated, there "is no path to guide us out of this dismal
maze."

Hearing the plea of Hester, Roger Chillingworth
is

unable to
restrain a thrill of admiration, too, for
there was a quality almost majestic in the despair which she
expressed.

"...I pity thee,
for the good that has been wasted in thy
nature."

Hester further
pleads with him to

readability="10">

"...Forgive, and leave his further retribution
to the Power that claims it!....There might be good for theee, and thee alone, since
thou hast been deeply wrong and hast it at thy will to pardon.....Wilt thou reject that
priceless benefit?"

But,
Chillingworth contradicts her, contending that he has no power to forgive
Dimmesdale:

readability="10">

"My old faith, long forgotten, comes back to me,
and explains all that we do, and all we suffer....It is our
fate."

This chapter closes on
the dismal grey note of Puritanism's--Chillingworth's "old faith"--condemnation of the
sinner, its sealing of the sinner's fate.  For, it does not good to pardon, or to reveal
one's sin; the sinner is yet condemned. This is why Hester says that it serves no
purpose the scarlet letter removed, it does not good for her to ask Chillingworth--"do
as thou wilt"--since hers and Dimmesdale's fates are sealed.  At the same time,
Hawthorne suggests his theme with Hester's idea of Dimmesdale's revealing his
sin. Hawthorne gives this thought succinct words in the
Conclusion:

readability="8">

"Be true!  Be true! Be true!  Show freely to the
world, if not your worst, yet some trait wherby the worst may be
inferred!"