As reality is one and cannot admit of multiplicity, therefore different opinions must ultimately become fused into one.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 285)
Bahá’u’lláh teaches that the foundations of the divine religion are one reality which does not admit of multiplicity or division. Therefore, the commandments and teachings of God are one. The religious differences and divisions which exist in the world are due to blind imitations of forms without knowledge or investigation of the fundamental divine reality which underlies all the religions. Inasmuch as these imitations of ancestral forms are various, dissensions have arisen among the people of religion. Therefore, it is necessary to free mankind from this subjection to blind belief by pointing the way of guidance to reality itself, which is the only basis of unity.
(‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 286)
Let all be set free from the multiple identities that were born of passion and desire, and in the oneness of their love for God, find a new way of life.
(‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 76).