Experience shows that ignorance breeds superstition and perpetuates religious prejudice and animosity.
(Bahá’í International Community, 1992 Feb 10, Creating a Climate of Religious Tolerance)

For example: If every one of the friends (believers) were to establish relations of friendship and right dealings with one of the negligent souls, associate and live with him with perfect kindliness, and meanwhile through good conduct and moral behavior lead him to divine instruction, to heavenly advice and teachings, surely he would gradually arouse that negligent person and would change his ignorance into knowledge.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 385)

Hence, it is firmly established that an untrained and uneducated daughter, on becoming a mother, will be the prime factor in the deprivation, ignorance, negligence and the lack of training of many children.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 399)

Man must free himself from the weeds of ignorance, thorns of superstitions and thistles of imitations, that he may discover reality in the harvests of true knowledge. Otherwise the discovery of reality is impossible, contention and divergence of religious belief will always remain and mankind, like ferocious wolves will rage and attack each other in hatred and antagonism. We supplicate God that He may destroy the veils which limit our vision and that these becloudings which darken the way of the manifestation of the shining lights may be dispelled in order that the effulgent Sun of Reality may shine forth. We implore and invoke God, seeking His assistance and confirmation.
(‘Abdu’l-Bahá, Foundations of World Unity, p. 76)

Now as to the Power that knoweth no limitations; limitation itself proveth the existence of the unlimited, for the limited is known through the unlimited, just as weakness itself proveth the existence of power, ignorance the existence of knowledge, poverty the existence of wealth. Without wealth there would be no poverty, without knowledge no ignorance, without light no darkness. Darkness itself is a proof of the existence of light for darkness is the absence of light.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 344)

Religious intolerance is a complex phenomenon with a multitude of causes. Available evidence suggests the underlying one is a pervasive ignorance about the beliefs of other peoples, an ignorance which breeds suspicion and fear. Frequently, the effects of this lack of understanding have been exacerbated by historical events which have left legacies of cultural estrangement.
(Bahá’í International Community, 1991 Feb 25, Promoting Religious Tolerance)

The antithesis of knowledge is ignorance, and the child of ignorance is superstition.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 240)

The first duty of the beloved of God and the maid-servants of the Merciful is this: They must strive by all possible means to educate both sexes, male and female; girls like boys; there is no difference whatsoever between them. The ignorance of both is blameworthy, and negligence in both cases is reprovable. “Are they who know and they who do not know equal?”
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 399)

The mineral world, for instance, is utterly unaware of the world of man and cannot comprehend it, but the ignorance of a thing is no proof of its non-existence.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 340)

There is a currently popular philosophy which says that each human being should be free to do whatever he wishes, and makes him happy, so long as his actions do not harm anyone else. This sounds very attractive, especially in a world which has been so oppressed by totalitarian regimes of one kind or another. One of the major difficulties in applying it is to be found in the degree to which individuals’ perceptions of what is harmful vary. Another, which is often overlooked, is the average human being’s ignorance of the divinely intended goal of his existence.
(From a letter written on behalf of the Universal House of Justice, 17 September 1993)

Through his ignorance, man fears death; but the death he shrinks from is imaginary and absolutely unreal; it is only human imagination.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 264)

Truly, I say, whatever lessens ignorance and increases knowledge, that has been, is and shall be accepted by the Creator.
(Compilations, Bahá’í Scriptures, p. 132)

When a movement fundamentally religious makes a weak nation strong, changes a nondescript tribal people into a mighty and powerful civilization, rescues them from captivity and elevates them to sovereignty, transforms their ignorance into knowledge and endows them with an impetus of advancement in all degrees of development—(this is not theory, but historical fact)—it becomes evident that religion is the cause of man’s attainment to honor and sublimity.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 272)

… ignorance itself is a torment, but it is a subtle torment …
(‘Abdu’l-Bahá, Some Answered Questions, p. 265)