I see the Bab and Baha'u'llah did fulfill this Biblical promise.
John 16:[13] Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come. [14] He shall glorify me: for he shall receive of mine, and shall shew it unto you."
So logically, one should be able to draw on what was given to provide answers that can be considered by themselves and others.
There has been a lot of comments made in this OP that I have already seen written down as a consequence of our neglect, or has a solution that has already been provided.
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We are born in the image of a perfect human, but we need to be educated into morals, virtues and the oneness of humanity.
Regards Tony