Clothe yourselves, O people, with the garment of assurance, in order that He may protect you from the dart of doubts and superstitions, and that ye may be of those who are assured in those days wherein none shall ever be assured and none shall be firmly established in the Cause, except by severing himself from all that is possessed by the people and turning unto the holy and radiant Outlook.
(Bahá’u’lláh, The Tablet of the Branch - from Bahá’í World Faith)
O thou who warmest thyself by the fire of the love of God, spreading from the Tree of the Covenant! Let thy soul be at ease and thy heart in peace concerning the perfect success and progress which the pen is not able to express, for in a short time thou shalt see the flag of the Kingdom waving in those far and wide regions, and the lights of the Truth shining brilliantly in its dawn above those horizons, and thou shalt know that thou art the center of the circle of the love of God, the axis around which souls revolve in their way and supplication to God.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 363)
Separate thyself from all thoughts, strip thyself from the unclean garment of attachment to this drossful (or earthly) world, arise for the service of thy Lord, the Clement, and be clothed with the robe of assurance (or certainty) so that thou mayest behold the hosts of confirmation from thy Lord arising from all sides.
(‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v3, p. 650)
Whatsoever instilleth assurance into the hearts of men, whatsoever exalteth their station or promoteth their contentment, is acceptable in the sight of God.
(Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 205)