Powerlessness and God's power

I've been thinking a great deal recently about my powerlessness and God's power. The issue came to a head when I was writing an introduction to Surah of the Almighty, in which Baha'u'llah says:

"God will render anyone who reflects the effulgence of this Name powerful over all things, to the extent that if he were to instruct all things to turn upside down, they would do so. If he should wish to conquer all beings by the power of his will, he would be enabled to accomplish it by the might of his Lord. This is, verily, a grace for all to see."

I didn't know what to make of it because I had never experienced anything like what is described here. I also thought that it couldn't be taken literally for I've never seen any Baha'i with such power - even Baha'u'llah opted to appear to the world as powerless, even though he wasn't. He argued that if he showed the world the real power he had, no one would disbelieve. So what to make of this passage?

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