Baha’u’llah was “singled… out and chosen… above all Thy [God’s] servants to reveal” God

Praised be Thou, O my God! How can I thank Thee for having singled me out and chosen me above all Thy servants to reveal Thee, at a time when all had turned away from Thy beauty! I testify, O my God, that if I were given a thousand lives by Thee, and offered them up all in Thy path, I would still have failed to repay the least of the gifts which, by Thy grace, Thou hast bestowed upon me.

I lay asleep on the bed of self when lo, Thou didst waken me with the divine accents of Thy voice, and didst unveil to me Thy beauty, and didst enable me to listen to Thine utterances, and to recognize Thy Self, and to speak forth Thy praise, and to extol Thy virtues, and to be steadfast in Thy love. Finally I fell a captive into the hands of the wayward among Thy servants.

Thou beholdest, therefore, the exile which I suffer in Thy days, and art aware of my vehement longing to look upon Thy face, and of mine irrepressible yearnings to enter the court of Thy glory, and of the stirrings of my heart under the influences of the winds of Thy mercy.

I entreat Thee, O Thou Who art the Ruler of the kingdoms of creation and the Author of all names, to write down my name with the names of them who, from eternity, have circled round the Tabernacle of Thy majesty, and clung to the hem of Thy loving-kindness, and held fast the cord of Thy tender mercy.

Thou art, in truth, the Help in Peril, the Self-Subsisting. 

- Baha’u’llah  (‘Prayers and Meditations by Baha’u’llah’)

Baha’u’llah thanks God for “all the troubles which have touched us in Thy path”

O Thou Who art the Ruler of earth and heaven and the Author of all names! Thou hearest the voice of my lamentation which from the fortress-town of Akká ascendeth towards Thee, and beholdest how my captive friends have fallen into the hands of the workers of iniquity.

We render Thee thanks, O our Lord, for all the troubles which have touched us in Thy path. Oh, that the span of my earthly life could be so extended as to embrace the lives of the former and the latter generations, or could even be so lengthened that no man on the face of the earth could measure it, and be afflicted every day and every moment with a fresh tribulation for love of Thee and for Thy pleasure’s sake!

Thou well knowest, however, O my God, that my wish is wholly dissolved in Thy wish, and that Thou hast irrevocably decreed that my soul should ascend unto the loftiest mansions of Thy Kingdom, and pass into the presence of my all-glorious Companion. 

- Baha’u’llah  (‘Prayers and Meditations by Baha’u’llah’)

“It would be wiser for the Bahá'ís to use the meditations given by Bahá'u'lláh and not use any set form of meditation given by someone else."

Bahá'ís have the bounty of having the prayers revealed by the Manifestations of God, the Báb and Bahá'u'lláh, as well as by 'Abdu'l-Bahá, which guide us in our devotions, but there is no prohibition of the reading of prayers or selections from the Sacred Writings of other religions. However, the Guardian stated, "It would be wiser for the Bahá'ís to use the meditations given by Bahá'u'lláh and not use any set form of meditation given by someone else." 

- The Universal House of Justice  (From a letter dated 14 September 1982, written on behalf of the Universal House of Justice to an individual believer; Compilation ‘Selected Guidance concerning Devotional Gatherings)

“predestined” “good” “conceived” by God for a believer

I beseech Thee, O Thou Who art my Companion in my lowliness, to rain down upon Thy loved ones from the clouds of Thy mercy that which will cause them to be satisfied with Thy pleasure, and will enable them to turn unto Thee and to be detached from all else except Thee. Ordain, then, for them every good conceived by Thee and predestined in Thy Book. 

- Baha’u’llah  (‘Prayers and Meditations by Baha’u’llah’)

Extent of the “tribulations” that “encompassed” Baha’u’llah

All praise be to Thee, O my God! Thou beholdest my helplessness and poverty, and bearest witness unto my woes and trials. How long wilt Thou abandon me among Thy servants? Suffer me to ascend into Thy presence. The power of Thy might beareth me witness! Such are the tribulations with which I am encompassed that I am powerless to recount them before Thy face. Thou, alone, verily, hast through Thy knowledge reckoned them. 

- Baha’u’llah  (‘Prayers and Meditations by Baha’u’llah’)

To “regard the world even as a shadow that vanisheth swifter than the twinkling of an eye”

Praised be Thou, O Lord my God! This is Thy servant who hath quaffed from the hands of Thy grace the wine of Thy tender mercy, and tasted of the savor of Thy love in Thy days. I beseech Thee, by the embodiments of Thy names whom no grief can hinder from rejoicing in Thy love or from gazing on Thy face, and whom all the hosts of the heedless are powerless to cause to turn aside from the path of Thy pleasure, to supply him with the good things Thou dost possess, and to raise him up to such heights that he will regard the world even as a shadow that vanisheth swifter than the twinkling of an eye. 

- Baha’u’llah  (‘Prayers and Meditations by Baha’u’llah’)