Bahá’u’lláh wrote:

“Praise be unto God, incomparable in majesty, power and beauty, peerless in glory, might and grandeur; too high is He for human imaginations to comprehend Him or for any peer or equal to be ascribed unto Him. He hath clearly set forth His straight Path in words and utterances of highest eloquence. Verily He is the All-Possessing, the Most Exalted. When He purposed to call the new creation into being, He sent forth the Manifest and Luminous Point from the horizon of His Will; it passed through every sign and manifested itself in every form until it reached the zenith, as bidden by God, the Lord of all men.”
(Tablets of Bahá’u’lláh, p. 101)

“O SON OF MAN!
Many a day hath passed over thee whilst thou hast busied thyself with thy fancies and idle imaginings. How long art thou to slumber on thy bed? Lift up thy head from slumber, for the Sun hath risen to the zenith, haply it may shine upon thee with the light of beauty.”
(The Hidden Words of Bahá’u’lláh, Part I.—From the Arabic, #62)

‘Abdu’l-Bahá explained:

“The Revelation of the Báb may be likened to the sun, its station corresponding to the first sign of the Zodiac—the sign Aries—which the sun enters at the vernal equinox. The station of Bahá’u’lláh’s Revelation, on the other hand, is represented by the sign Leo, the sun’s mid-summer and highest station. By this is meant that this holy Dispensation is illumined with the light of the Sun of Truth shining from its most exalted station, and in the plenitude of its resplendency, its heat and glory.”
(‘Abdu’l-Bahá, quoted in God Passes By, p. 99-100)

“Praise be to God that the teachings of God are revoiced, the light of reality has dawned again, the effulgence is increasing daily, and the radiance is shining more gloriously in the zenith. From the cloud of mercy a deluge is descending; the Sun of Reality is brilliant in its eternal station…”
(The Promulgation of Universal Peace, p. 55)