We become an expert when we apply the Scriptures and it produces the desired results. Then with signs miracles and wonders in front of us is when we can get out of the cheap talk because we are applying biblical principles and getting spiritual results. Paul put it this way...And you think this makes you a world-class expert on the resurrected Jesus? It is certainly one view as to "how it works," and I'm not even in violent disagreement with it, but it's just one more human attempt to make sense in a connect-the-dots sort of way with something that is fundamentally an unfathomable mystery. It's your little mental framework for thinking about Jesus. The term "expert" in reference to the resurrected Christ is indeed inherently comical; if you recognized this reality and dropped the "expert" pose, people might be more receptive to what you have to say.
My speech and my preaching was not with enticing words of man's wisdom, but in demonstration of the spirit and of power.