Shakespeare: There is No Vice So Simple

The world is still deceived with ornament.
In law, what plea so tainted and corrupt,
But being seasoned with a gracious voice,
Obscures the show of evil? In religion,
What damned error but some sober brow
Will bless it, and approve it with a text,
Hiding the grossness with fair ornament?
There is no vice so simple but assumes
Some mark of virtue on his outward parts.

 –Bassanio, in William Shakespeare’s The Merchant of Venice (3.2.74-82)