Principle 4:
Religion must be the Cause of Unity
An essential principle of Bahá'u'lláh's teaching
is that religion must be the
cause of unity and love amongst men;
that it is the supreme effulgence of Divinity,
the stimulus of life, the source of
honor and productive of eternal existence.
( 'Abdu'l-Bahá , The Promulgation of Universal Peace, p. 394)