In which parts of this excerpt from "dover beach" by matthew arnold does the speaker describe the sorrow and confusion that he wants to escape?

[the sea of faith
was once, too, at the full,] and round earth's shore
lay like the folds of a bright girdle furl'd.
[but now i only hear
its melancholy, long, withdrawing roar,]
retreating, to the breath
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
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;
[and we are here as on a darkling plain]
swept with confused alarms of struggle and flight,
where ignorant armies clash by night.