And yet they [“the divines of the age”] bear witness to this
well-known tradition: “Verily Our Word is abstruse, bewilderingly abstruse.” In
another instance, it is said: “Our Cause is sorely trying, highly perplexing;
none can bear it except a favorite of heaven, or an inspired Prophet, or he
whose faith God hath tested.” These leaders of religion admit that none of
these three specified conditions is applicable to them. The first two
conditions are manifestly beyond their reach; as to the third, it is evident
that at no time have they been proof against those tests that have been sent by
God, and that when the divine Touchstone appeared, they have shown themselves
to be naught but dross.
(Baha’u’llah, ‘The Kitab-i-Iqan’)