And among the teachings of Baha'u'llah is that religion is a mighty bulwark. If the edifice of religion shakes and totters, commotion and chaos will ensue and the order of things will be utterly upset, for in the world of mankind there are two safeguards that protect man from wrongdoing. One is the law which punishes the criminal; but the law prevents only the manifest crime and not the concealed sin; whereas the ideal safeguard, namely, the religion of God, prevents both the manifest and the concealed crime, trains man, educates morals, compels the adoption of virtues and is the all-inclusive power which guarantees the felicity of the world of mankind. But by religion is meant that which is ascertained by investigation and not that which is based on mere imitation, the foundations of Divine Religions and not human imitations.
Abdu'l-Baha, Selections from the Writings of Abdu'l-Baha