Robert Browning Quote

There shall never be one lost good! What was, shall live as before;
The evil is null, is nought, is silence implying sound;
What was good shall be good, with for evil so much good more;
On the earth the broken arcs; in the heaven, a perfect round.

Abt Vogler, ix. - Bartlett's Familiar Quotations, 10th ed. (1919)