@stragu

Mind from its object differs most in this:
Evil from good; misery from happiness;
The baser from the nobler; the impure
And frail, from what is clear and must endure.
If you divide suffering and dross, you may
Diminish till it is consumed away;
If you divide pleasure and love and thought,
Each part exceeds the whole; and we know not
How much, while any yet remains unshared,
Of pleasure may be gained, of sorrow spared:
This truth is that deep well, whence sages draw
The unenvied light of hope; the eternal law
By which those live, to whom this world of life
Is as a garden ravaged, and whose strife
Tills for the promise of a later birth
The wilderness of this Elysian earth.

(From Shelley's _Epipsychidion_, which is, all told, kind of iffy, but I love this section.)