O, mickle is the powerful grace that lies

In herbs, plants, stones, and their true qualities:

For nought so vile that on the earth doth live

But to the earth some special good doth give,

Nor aught so good but strain'd from that fair use

Revolts from true birth, stumbling on abuse:

Virtue itself turns vice, being misapplied;

And vice sometimes by action dignified.

William Shakespeare (1564-1616): Romeo and Juliet. Act ii. Sc. 3.

The quality of mercy is not strain'd,

It droppeth as the gentle rain from heaven

Upon the place beneath. It is twice blest:

It blesseth him that gives and him that takes.

'T is mightiest in the mightiest: it becomes

The throned monarch better than his crown;

His sceptre shows the force of temporal power,

The attribute to awe and majesty,

Wherein doth sit the dread and fear of kings;

But mercy is above this sceptred sway,

It is enthroned in the hearts of kings,

It is an attribute to God himself;

And earthly power doth then show likest God's,

When mercy seasons justice. Therefore, Jew,

Though justice be thy plea, consider this,

That in the course of justice none of us

Should see salvation: we do pray for mercy;

And that same prayer doth teach us all to render

The deeds of mercy.

William Shakespeare (1564-1616): The Merchant of Venice. Act iv. Sc. 1.