Lines Composed a Few Miles above Tintern Abbey, on Revisiting the Banks of the Wye during a Tour, July 13, 1798
How we cite our quotes:
Which at this season, with their unripe fruits,
Are clad in one green hue, and lose themselves
'Mid groves and copses. (11-14)
The "unripe fruits" of Line 12 will, eventually, and in Nature's good time, transform into ripe fruit. Perhaps they're supposed to represent the kind of mind that the speaker used to possess, the kind of mind that could appreciate nature, but couldn't "see into the life of things" (49).
I have […] felt in the blood, and felt along the heart;
And passing even into my purer mind,
With tranquil restoration: (26-30)
The memory of the "beauteous forms" (22) actually causes a physical change in the speaker. He feels it "in the blood" and "along the heart." It's the healing power of nature.
While here I stand, not only with the sense
Of present pleasure, but with the pleasing thoughts
That in this moment there is life and food
For future years. (62-65)
As the speaker is standing on the banks of the Wye, soaking up the beauty he sees there, he imagines that in "future years" he'll be able to turn to these memories with "pleasure." He imagines that he'll continue to change and evolve as a result of his relationship with Nature.