O MAN OF TWO VISIONS!
Close one eye and open the other. Close one to the world and all that is therein, and open the other to the hallowed beauty of the Beloved.
(Baha'u'llah, The Persian Hidden Words)
"O Kazim, close thine eye to the people of the world; drink the water of knowledge from the heavenly cup bearers, and listen not to the nonsensical utterances of the manifestations of Satan, because the manifestations of Satan are occupying today the observation posts of the glorious path of God, and preventing the people by every means of deception and ruse. Before long you will witness the turning away of the people of Bayan from the Manifestation of the Merciful."
(Abdu'l-Baha, Baha'i World Faith - Abdu'l-Baha Section, p. 431)
Just to explain that Satan is really satan, and a part of every member of humankind, but NOT a seperate entity:
"The reality underlying this question is that the evil spirit, Satan or whatever is interpreted as evil, refers to the lower nature in man. This baser nature is symbolized in various ways. In man there are two expressions, one is the expression of nature, the other the expression of the spiritual realm. The world of nature is defective. Look at it clearly, casting aside all superstition and imagination. If you should leave a man uneducated and barbarous in the wilds of Africa, would there be any doubt about his remaining ignorant? God has never created an evil spirit; all such ideas and nomenclature are symbols expressing the mere human or earthly nature of man. It is an essential condition of the soil of earth that thorns, weeds and fruitless trees may grow from it. Relatively speaking, this is evil; it is simply the lower state and baser product of nature."
(Abdu'l-Baha, Foundations of World Unity, p. 77)