How we cite our quotes: (Line)
Quote #1
Have I forgot, my only Love, to love thee,
Severed at last by Time's all-severing wave? (3-4)
The words "at last" give the impression that the speaker believes time has the ability to sever even our ability to remember love. It seems then that everything under the sun, including all of our experiences, are vulnerable to the effects of time, no matter how much we may love someone and want to hang on.
Quote #2
Sweet Love of youth, forgive, if I forget thee,
While the world's tide is bearing me along;
Other desires and other hopes beset me,
Hopes which obscure, but cannot do thee wrong! (13-16)
The world's tide is bearing the speaker along, giving her a different perspective on her sweet love of youth. But even if those hopes "obscure" her remembrance of that love, that doesn't mean they will harm it or make it any less important. So there's a difference between remembering love, in the intellectual sense, and simply feeling love.
Quote #3
Faithful, indeed, is the spirit that remembers
After such years of change and suffering! (11-12)
Time has brought lots of changes and suffering for the speaker but she still remembers to love. She doesn't doubt her faithfulness to her lover, but she's aware that time is passing by and bringing changes that she can't necessarily anticipate. But we still sense her internal struggle regarding those changes and what that means for her "spirit that remembers."