The difference is too nice - Where ends the virtue or begins the vice

Vice is a monster of so frightful mien, As to be hated need but to be seen; Yet seen too oft, familiar with her face, We first endure, then pity, then embrace.

The heart resolves this matter in a trice, "Men only feel the smart, but not the vice."

Virtue, I grant you, is an empty boast; But shall the dignity of vice be lost?

Virtue practiced to be seen is not real virtue; vice which fears to be seen is real vice

Virtue by calculation is the virtue of vice