Lines Composed a Few Miles above Tintern Abbey, on Revisiting the Banks of the Wye during a Tour, July 13, 1798 Awe and Amazement

The speaker is back on the banks of the Wye, and the view is staggeringly beautiful. The "steep and lofty cliffs," especially, inspire him with awe. Perhaps it's because of their height and dramatic steepness that he is particularly drawn to the cliffs.

The speaker's memory of the "beauteous forms" (22) not only cheers him up when he's feeling bummed, but also makes him feel as though the weight of the world "is lightened." He calls the sensation a "blessed mood." This is the first hint of the almost religious devotion that the "presence" in Nature will inspire in him.

When the speaker remembers the "beauteous forms" (22), he's not so distracted by the immediate sensations of the "steep and lofty cliffs." He's able to reflect more. And that thoughtful reflection leads to the almost meditative trance that he describes here. His breath slows down and even his heart rate seems to drop.

The speaker's trance-like state allows him to become more spiritually awakened. His body is irrelevant, and he "become[s] a living soul."

The harmony, or beautiful balance, that the speaker remembers in the "beauteous forms" makes his "eye" "quiet." He's not distracted by his physical surroundings. There could also be a pun in these lines. His physical "eye" is "made quiet," but so is his "I". His sense of himself, or his ego, is quieted. He can see beyond himself when he's in this meditative state.

The speaker has learned to sense a "presence" in nature. It's awe-inspiring, but it's also "disturb[ing]." Why "disturb[ing]" if it fills him with "joy"? Maybe because it's so "sublime" – so great and so incomprehensible – that he has trouble processing it. That could be "disturb[ing]."