Classic Poem

My life's a pleasure and a pain;
A real loss, a real gain;
A glorious paradise of joys,
A grievous prison of annoys.

I daily joy, and daily mourn,
Yet daily wait the tide's return:
Then sorrow deep my spirit chears,
I'm joyful in a flood of tears.

On this condition I have all,
Yet all is unconditional.

Though freest mercy I implore,
Yet I am safe on justice' score.
Which never could the guilty free,
Yet fully clears most guilty me.