Thus Nature gives us (let it check our pride)
The virtue nearest to our vice allied:
Reason the bias turns to good from ill
And Nero reigns a Titus, if he will.
The fiery soul abhorred in Catiline,
In Decius charms, in Curtius is divine:
The same ambition can destroy or save,
And makes a patriot as it makes a knave.
This light and darkness in our chaos joined,
What shall divide? The God within the mind.
Extremes in nature equal ends produce,
In man they join to some mysterious use;
Though each by turns the other's bound invade,
As, in some well-wrought picture, light and shade,
And oft so mix, the difference is too nice
Where ends the virtue or begins the vice.
Fools! who from hence into the notion fall,
That vice or virtue there is none at all.
If white and black blend, soften, and unite
A thousand ways, is there no black or white?
Ask your own heart, and nothing is so plain;
'Tis to mistake them, costs the time and pain.
Vice is a monster of so frightful mien,
As, to be hated, needs but to be seen;
Yet seen too oft, familiar with her face,
We first endure, then pity, then embrace.
But where th' extreme of vice, was ne'er agreed:
Ask where's the north? at York, 'tis on the Tweed;
In Scotland, at the Orcades; and there,
At Greenland, Zembla, or the Lord knows where.