…it is indeed within the power of Him Who changeth the earth into another earth to transform all that dwell and move thereon. Wherefore marvel not at how He turneth darkness into light, light into darkness, ignorance into knowledge, error into guidance, death into life, and life into death. It is in this station that the law of transformation taketh effect. Ponder thereon, if thou be of them that tread this path, that all thou didst ask of this lowly One may be made plain unto thee and that thou mayest abide within the tabernacle of this guidance. For He doeth whatsoever He willeth and ordaineth whatsoever He pleaseth. Nor shall He be asked of His doings, whilst all men will be asked of their every deed. [cf. Qur’án 21:23] (Baha’u’llah, ‘Gems of Divine Mysteries’)
Immerse yourselves in the ocean of My words, that ye may unravel its secrets, and discover all the pearls of wisdom that lie hid in its depths. Take heed that ye do not vacillate in your determination to embrace the truth of this Cause--a Cause through which the potentialities of the might of God have been revealed, and His sovereignty established. With faces beaming with joy, hasten ye unto Him. This is the changeless Faith of God, eternal in the past, eternal in the future. (Baha’u’llah, 'The Kitab-i-Aqdas’; The Compilation of Compilations, vol. II, The Importance of Prayer, Meditation and Devotional Attitude)
Existence is of two kinds: one is the existence of God which is beyond the comprehension of man. He, the invisible, the lofty and the incomprehensible, is preceded by no cause but rather is the Originator of the cause of causes. He, the Ancient, hath had no beginning and is the all-independent. The second kind of existence is the human existence. It is a common existence, comprehensible to the human mind, is not ancient, is dependent and hath a cause to it. The mortal substance does not become eternal and vice versa; the human kind does not become a Creator and vice versa. The transformation of the innate substance is impossible. (‘Abdu’l-Baha, ‘Selections from the Writings of ‘Abdu’l-Baha’)
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O ye Cohorts of God! Today in the present world each community is wandering in a wilderness, moving in accord with some passion and desire, and running to and fro in pursuance of his own imagination. Among the communities of the world, this community of the “Most Great Name” is free from every thought, keeping aloof from every project and scheme, arising with the purest designs and intentions, and striving and endeavoring with the utmost hope to live in accordance with the divine teachings in order that the surface of the earth become the delectable paradise, the nether world become the mirror of the Kingdom, the universe become another universe, and the human race attain to higher morals, conduct and manners. (‘Abdu’l-Baha, ‘Tablets of ‘Abdu’l-Baha’’, vol. 1)