One must call the people to love and faithfulness, to zeal
and contentment, that the sinful may be admonished and the ranks of the
virtuous may swell. Nor is it possible that there be no sinners: So long as the
name “the Ever-Forgiving” shineth resplendent above the horizon of existence,
there will be sinners in the world of creation, for the latter cannot appear
without the former and the former cannot exist without the latter.
- Baha’u’llah (From the 'Letter Bá to the Letter Há'; ‘The Call of the Divine Beloved’)