This is the Cause that hath caused all your superstitions and idols to tremble.

Bahá’u’lláh, Synopsis and Codification of the Kitab-i-Aqdas, p. 26

Thus have their superstitions become veils between them and their own hearts and kept them from the path of God.

Bahá’u’lláh, Tablet of Ahmad

For today the people out of the depths of their superstition, imagine that any individual who believes in God and His signs, and in the Prophets and Divine Revelations and laws, and is a devout and God-fearing person, must of necessity remain idle and spend his days in sloth, so as to be considered in the sight of God as one who has forsaken the world and its vanities, set his heart on the life to come, and isolated himself from human beings in order to draw nearer to God.

‘Abdu’l-Bahá, The Secret of Divine Civilization, p. 39-40

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.

‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 175-176

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.

‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 63-64

Look around and see how the world of today is drowned in superstition and outward forms!

‘Abdu’l-Bahá, Paris Talks, p. 144