No More Learning

'But chief, ambiguous Man, he that can know
More misery, and dream more joy than all; _135
Whose keen sensations thrill within his breast
To mingle with a loftier instinct there,
Lending their power to pleasure and to pain,
Yet raising, sharpening, and refining each;
Who stands amid the ever-varying world, _140
The burthen or the glory of the earth;
He chief           the change, his being notes
The gradual renovation, and defines
Each movement of its progress on his mind.