In this excerpt from "dover beach" by matthew arnold, which two lines or sets of lines suggest that the speaker has undergone a loss of faith?

the sea of faith
was once, too, at the full, and round earth's shore

a.
lay like the folds of a bright girdle furled.

b.
but now i only hear
its melancholy, long, withdrawing roar,

retreating, to the breath

c.
of the night-wind, down the vast edges drear

and naked shingles of the world.
ah, love, let us be true
to one another! for the world, which seems

d.
to lie before us like a land of dreams,

so various, so beautiful, so new,
hath really neither joy, nor love, nor light,
nor certitude, nor peace, nor for pain;

e.
and we are here as on a darkling plain
swept with confused alarms of struggle and flight,

where ignorant armies clash by night.