What I have been questioning is the existence of an evil being callled Satan. I do not question the existence of Angels.
Baha'u'llah also puts belief in God's Angels as very important, as can be seen in the following passages. The passage at the bottom
(The Kitáb-i-Íqán, pp. 78-80) explains what is meant by Angels.
“Let not your hearts be perturbed, O people, when the glory of My Presence is withdrawn, and the ocean of My utterance is stilled. In My presence amongst you there is a wisdom, and in My absence there is yet another, inscrutable to all but God, the Incomparable, the All-Knowing. Verily, We behold you from Our realm of glory, and shall aid whosoever will arise for the triumph of Our Cause with the hosts of the Concourse on high and
a company of Our favored angels.”
Gleanings From the Writings of Bahá’u’lláh, p. 139
“Whatsoever people is graciously favoured therewith by God, its name shall surely be magnified and extolled by the Concourse from on high,
by the company of angels, and the denizens of the Abhá Kingdom. And whatsoever people turneth its heart away from this Divine Love—the revelation of the Merciful—shall err grievously, shall fall into despair, and be utterly destroyed. That people shall be denied all refuge, shall become even as the vilest creatures of the earth, victims of degradation and shame.”
Selections From the Writings of ‘Abdu’l-Bahá, pp. 27-28
“Know ye that the world and its vanities and its embellishments shall pass away. Nothing will endure except God’s Kingdom which pertaineth to none but Him, the Sovereign Lord of all, the Help in Peril, the All-Glorious, the Almighty. The days of your life shall roll away, and all the things with which ye are occupied and of which ye boast yourselves shall perish,
and ye shall, most certainly, be summoned by a company of His angels to appear at the spot where the limbs of the entire creation shall be made to tremble, and the flesh of every oppressor to creep. Ye shall be asked of the things your hands have wrought in this, your vain life, and shall be repaid for your doings. This is the day that shall inevitably come upon you, the hour that none can put back. To this the Tongue of Him that speaketh the truth and is the Knower of all things hath testified.”
Gleanings From the Writings of Bahá’u’lláh, p. 125
“Certain ones among you have said: “He it is Who hath laid claim to be God.” By God! This is a gross calumny.
I am but a servant of God Who hath believed in Him and in His signs, and in His Prophets and in His angels. My tongue, and My heart, and My inner and My outer being testify that there is no God but Him, that all others have been created by His behest, and been fashioned through the operation of His Will. There is none other God but Him, the Creator, the Raiser from the dead, the Quickener, the Slayer. I am He that telleth abroad the favors with which God hath, through His bounty, favored Me. If this be My transgression, then I am truly the first of the transgressors. I and My kindred are at your mercy. Do ye as ye please, and be not of them that hesitate, that I might return to God My Lord, and reach the place where I can no longer behold your faces. This, indeed, is My dearest wish, My most ardent desire. Of My state God is, verily, sufficiently informed, observant.”
Gleanings From the Writings of Bahá’u’lláh, p. 228
“They that have forsaken their country for the purpose of teaching Our Cause—these shall the Faithful Spirit strengthen through its power.
A company of Our chosen angels shall go forth with them, as bidden by Him Who is the Almighty, the All-Wise. How great the blessedness that awaiteth him that hath attained the honor of serving the Almighty! By My life! No act, however great, can compare with it, except such deeds as have been ordained by God, the All-Powerful, the Most Mighty. Such a service is, indeed, the prince of all goodly deeds, and the ornament of every goodly act. Thus hath it been ordained by Him Who is the Sovereign Revealer, the Ancient of Days.”
Gleanings From the Writings of Bahá’u’lláh, p. 334
“Every time My name “the All-Merciful” was told that one of My lovers had breathed a word that runneth counter to My wish, it repaired, grief-stricken and disconsolate to its abode; and whenever My name “the Concealer” discovered that one of My followers had inflicted any shame or humiliation on his neighbor, it, likewise, turned back chagrined and sorrowful to its retreats of glory, and there wept and mourned with a sore lamentation. And whenever My name “the Ever-Forgiving” perceived that any one of My friends had committed any transgression, it cried out in its great distress, and, overcome with anguish, fell upon the dust,
and was borne away by a company of the invisible angels to its habitation in the realms above.”
Gleanings From the Writings of Bahá’u’lláh, pp. 308-309
“Intone, O My servant, the verses of God that have been received by thee, as intoned by them who have drawn nigh unto Him, that the sweetness of thy melody may kindle thine own soul, and attract the hearts of all men. Whoso reciteth, in the privacy of his chamber, the verses revealed by God,
the scattering angels of the Almighty shall scatter abroad the fragrance of the words uttered by his mouth, and shall cause the heart of every righteous man to throb. Though he may, at first, remain unaware of its effect, yet the virtue of the grace vouchsafed unto him must needs sooner or later exercise its influence upon his soul. Thus have the mysteries of the Revelation of God been decreed by virtue of the Will of Him Who is the Source of power and wisdom.”
Gleanings From the Writings of Bahá’u’lláh, p. 295
“This is the Day whereon the All-Merciful hath come down in the clouds of knowledge, clothed with manifest sovereignty. He well knoweth the actions of men. He it is Whose glory none can mistake, could ye but comprehend it. The heaven of every religion hath been rent, and the earth of human understanding been cleft asunder,
and the angels of God are seen descending.” Gleanings From the Writings of Bahá’u’lláh, p. 45
“Call out to Zion, O Carmel, and announce the joyful tidings: He that was hidden from mortal eyes is come! His all-conquering sovereignty is manifest; His all-encompassing splendor is revealed. Beware lest thou hesitate or halt. Hasten forth and circumambulate the City of God that hath descended from heaven, the celestial Kaaba round which have circled in adoration the favored of God,
the pure in heart, and the company of the most exalted angels. Oh, how I long to announce unto every spot on the surface of the earth, and to carry to each one of its cities, the glad-tidings of this Revelation—a Revelation to which the heart of Sinai hath been attracted, and in whose name the Burning Bush is calling: ‘Unto God, the Lord of Lords, belong the kingdoms of earth and heaven.’ Verily this is the Day in which both land and sea rejoice at this announcement, the Day for which have been laid up those things which God, through a bounty beyond the ken of mortal mind or heart, hath destined for revelation. Ere long will God sail His Ark upon thee, and will manifest the people of Bahá who have been mentioned in the Book of Names.”
Gleanings From the Writings of Bahá’u’lláh, p. 16
“The earth hath been shaken, and the mountains have passed away,
and the angels have appeared, rank on rank, before Us. Most of the people are bewildered in their drunkenness and wear on their faces the evidences of anger. Thus have We gathered together the workers of iniquity. We see them rushing on towards their idol. Say: None shall be secure this Day from the decree of God. This indeed is a grievous Day. We point out to them those that led them astray. They see them, and yet recognize them not. Their eyes are drunken; they are indeed a blind people. Their proofs are the calumnies they uttered; condemned are their calumnies by God, the Help in Peril, the Self-Subsisting. The Evil One hath stirred up mischief in their hearts, and they are afflicted with a torment that none can avert. They hasten to the wicked, bearing the register of the workers of iniquity. Such are their doings.”
Gleanings From the Writings of Bahá’u’lláh, p. 41
“And now, concerning His words: “And He shall send His angels….” By “angels” is meant those who, reinforced by the power of the spirit, have consumed, with the fire of the love of God, all human traits and limitations, and have clothed themselves with the attributes of the most exalted Beings and of the Cherubim. That holy man, Ṣádiq,
37 in his eulogy of the Cherubim, saith: “There stand a company of our fellow-
Shí’ihs behind the Throne.” Divers and manifold are the interpretations of the words “behind the Throne.” In one sense, they indicate that no true
Shí’ihs exist. Even as he hath said in another passage: “A true believer is likened unto the philosopher’s stone.” Addressing subsequently his listener, he saith: “Hast thou ever seen the philosopher’s stone?” Reflect, how this symbolic language, more eloquent than any speech, however direct, testifieth to the non-existence of a true believer. Such is the testimony of Ṣádiq. And now consider, how unfair and numerous are those who, although they themselves have failed to inhale the fragrance of belief, have condemned as infidels those by whose word belief itself is recognized and established.
And now, inasmuch as these holy beings have sanctified themselves from every human limitation, have become endowed with the attributes of the spiritual, and have been adorned with the noble traits of the blessed, they therefore have been designated as “angels.” Such is the meaning of these verses, every word of which hath been expounded by the aid of the most lucid texts, the most convincing arguments, and the best established evidences.”
The Kitáb-i-Íqán, pp. 78-80