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

Now, since that Luminary of truth has set, all stand in need of proofs, and so we have been occupied with providing rational proofs. Let us mention another, and this undeniable proof should alone suffice any fair-minded soul: It is that this illustrious Being advanced His Cause from within the Most Great Prison, whence His light shone forth, His fame encircled the globe, and the word of His glory reached both East and West. To this day such a thing has never come to pass, if the matter be examined with fairness. But there are certain souls who, even if they were to hear every proof in the world, would not judge fairly! Governments and peoples with all their might failed to resist Him, while He, alone and single-handed, wronged and imprisoned, accomplished whatsoever He had purposed (10:2)

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