Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

It is clear, however, that mere human power is incapable of fulfilling this great office, and that the results of human thought alone cannot secure such bounties. How can a single person, with no aid or assistance, lay the foundations of such a lofty edifice? A divine and spiritual power is therefore needed to enable him to carry out this mission. Behold! One sanctified Soul revives the world of humanity, transforms the face of the globe, develops the minds, quickens the souls, inaugurates a new life, establishes new foundations, orders the world, gathers the nations and religions under the shadow of one banner, delivers man from the realm of baseness and deficiency, and exhorts and encourages him to develop his innate and acquired perfections. Certainly nothing short of a divine power could accomplish this feat! One must examine this matter fairly, as this indeed is an occasion for fairness (3:12)

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