Bahá'u'lláh has declared that religion must be in accord with science and reason. If it does not correspond with scientific principles and the processes of reason, it is superstition. For God has endowed us with faculties by which we may comprehend the realities of things, contemplate reality itself. If religion is opposed to reason and science, faith is impossible; and when faith and confidence in the divine religion are not manifest in the heart, there can be no spiritual attainment.1 

If religious beliefs and opinions are found contrary to the standards of science, they are mere superstitions and imaginations; for the antithesis of knowledge is ignorance, and the child of ignorance is superstition. Unquestionably there must be agreement between true religion and science. If a question be found contrary to reason, faith and belief in it are impossible, and there is no outcome but wavering and vacillation. 2 

There are certain pillars which have been established as the unshakeable supports of the Faith of God. The mightiest of these is learning and the use of the mind, the expansion of consciousness, and insight into the realities of the universe and the hidden mysteries of Almighty God. To promote knowledge is thus an inescapable duty imposed on every one of the friends of God. 3 

Among other principles of Bahá'u'lláh's teachings was the harmony of science and religion. Religion must stand the analysis of reason. It must agree with scientific fact and proof so that science will sanction religion and religion fortify science. Both are indissolubly welded and joined in reality. If statements and teachings of religion are found to be unreasonable and contrary to science, they are outcomes of superstition and imagination. Innumerable doctrines and beliefs of this character have arisen in the past ages. Consider the superstitions and mythology of the Romans, Greeks and Egyptians; all were contrary to religion and science. It is now evident that the beliefs of these nations were superstitions, but in those times they held to them most tenaciously. For example, one of the many Egyptian idols was to those people an authenticated miracle, whereas in reality it was a piece of stone. As science could not sanction the miraculous origin and nature of a piece of rock, the belief in it must have been superstition. It is now evident that it was superstition. Therefore, we must cast aside such beliefs and investigate reality. That which is found to be real and conformable to reason must be accepted, and whatever science and reason cannot support must be rejected as imitation and not reality. Then differences of belief will disappear. All will become as one family, one people, and the same susceptibility to the divine bounty and education will be witnessed among mankind. 4 

Every religion which is not in accordance with established science is superstition. Religion must be reasonable. If it does not square with reason, it is superstition and without foundation. It is like a mirage, which deceives man by leading him to think it is a body of water. God has endowed man with reason that he may perceive what is true. If we insist that such and such a subject is not to be reasoned out and tested according to the established logical modes of the intellect, what is the use of the reason which God has given man? The eye is the organ of sense by which we view the world of outer phenomena; hearing is the faculty for distinguishing sounds; taste senses the properties of objects, such as bitter, sweet; smell detects and differentiates odors; touch reveals attributes of matter and perfects our communication with the outer world; yet after all, the circle and range of perception by the five senses is exceedingly limited. But the intellectual faculty of man is unlimited in its sphere of action. The eye views details perhaps a mile, but the intellect can perceive the far East and West. The ear may hear tone modulations at one thousand feet, but the mind of man can detect the harmonies of the heavenly spheres as they swing in their courses. Mind makes geological discoveries in subterranean depths and determines the processes of creation in the earth's lowest strata. The sciences and arts, all inventions, crafts, trades and their products have come forth from the intellect of man. It is evident that within the human organism the intellect occupies the supreme station. Therefore, if religious belief, principle or creed is not in accordance with the intellect and the power of reason, it is surely superstition. 5 

Another cause of dissension and disagreement is the fact that religion has been pronounced at variance with science. Between scientists and the followers of religion there has always been controversy and strife for the reason that the latter have proclaimed religion superior in authority to science and considered scientific announcement opposed to the teachings of religion. Bahá'u'lláh declared that religion is in complete harmony with science and reason. If religious belief and doctrine is at variance with reason, it proceeds from the limited mind of man and not from God; therefore, it is unworthy of belief and not deserving of attention; the heart finds no rest in it, and real faith is impossible. How can man believe that which he knows to be opposed to reason? Is this possible? Can the heart accept that which reason denies? Reason is the first faculty of man, and the religion of God is in harmony with it. Bahá'u'lláh has removed this form of dissension and discord from among mankind and reconciled science with religion by revealing the pure teachings of the divine reality. This accomplishment is specialized to Him in this Day. 6 

There is no contradiction between true religion and science. When a religion is opposed to science it becomes mere superstition: that which is contrary to knowledge is ignorance. 

How can a man believe to be a fact that which science has proved to be impossible? If he believes in spite of his reason, it is rather ignorant superstition than faith. The true principles of all religions are in conformity with the teachings of science. 

The Unity of God is logical, and this idea is not antagonistic to the conclusions arrived at by scientific study. 

All religions teach that we must do good, that we must be generous, sincere, truthful, law-abiding, and faithful; all this is reasonable, and logically the only way in which humanity can progress. 7

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