Sorrow and sin, and suffering and strife,
Have been cast in the waters of my life;
And they have sunk deep down to the well-head,
And all that flows thence is embitterèd.
Yet still the fountain up towards heaven springs,
And still the brook where'er it wanders sings;
And still where'er it hath found leave to rest,
The blessed sun looks down into its breast;
And it reflects, as in a mirror fair,
The image of all beauty shining there.

Frances Anne Kemble

http://www.poemhunter.com/poem/impromptu-iv/