Analysis of Of joys and pleasing pains

Of joys and pleasing pains I late went singing,
O joys with pains! O pains with joys consenting!
And little thought as then of now repenting;
But now think of my then sweet bitter stinging,
All day long I my hands, alas! go wringing,
The baleful notes of which, my sad tormenting,
Are ruth and moan, frights, sobs, and loud lamenting,
From hills and dales, in my dull ears still ringing.