"Among the teachings of Bahá’u’lláh is His declaration that religion must be the cause of love and fellowship, must be the source of unity in the hearts of men. If religion becomes a cause of enmity and hatred, it is evident that the abolition of religion is preferable to its promulgation; for religion is a remedy for human ills. If a remedy should be productive of disease, it is certainly advisable to abandon it.
Furthermore, the teachings of Bahá’u’lláh announce that religion must be in conformity with science and reason; otherwise, it is superstition; for science and reason are realities, and religion itself is the Divine Reality unto which true science and reason must conform. God has bestowed the gift of mind upon man in order that he may weigh every fact or truth presented to him and adjudge whether it be reasonable. That which conforms to his reason he may accept as true, while that which reason and science cannot sanction may be discarded as imagination and superstition, as a phantom and not reality. Inasmuch as the blind imitations or dogmatic interpretations current among men do not coincide with the postulates of reason, and the mind and scientific investigation cannot acquiesce thereto, many souls in the human world today shun and deny religion. That is to say, imitations, when weighed in the scales of reason, will not conform to its standard and requirement. Therefore, these souls deny religion and become irreligious, whereas if the reality of the divine religions becomes manifest to them and the foundation of the heavenly teachings is revealed coinciding with facts and evident truths, reconciling with scientific knowledge and reasonable proof, all may acknowledge them, and irreligion will cease to exist. In this way all mankind may be brought to the foundation of religion, for reality is true reason and science, while all that is not conformable thereto is mere superstition."
`Abdu'l-Bahá,
The Promulgation of Universal Peace , pp. 373-374
25 October 1912
(excerpt from) Talk at Hotel Sacramento
Sacramento, California