This is a point that I take to heart but I find it difficult to make that last step to show others what I've learned out of fear of being factually incorrect. How do you overcome this hurdle?
I've embraced this. Yes, by gum, I will stand in front of a room full of people who have paid thousands of dollars each to be there, I will plow thru the material with gusto and enthusiasm, I will create content on the fly if I have to based on my experience and skill, and if I make a mistake or slam into an embarrassing dead end then I will accept it and use it as a teaching moment to explain that even the best make mistakes or get stuck and that I'll get them a correct answer ASAP and in the meantime we will either start the topic over or move on to the next one. This is reality, this is me, this is what real developers have to deal with, and I'm not going to apologize (per se) for it.
No fear. No apologies. Do the best you can in front of an audience because you love the material. If you're going to be inaccurate, then be _definitively_ inaccurate.
In the last training section I ran I hijacked 7 of my employees to sit through the talk. For me this is a no pressure scenario and nothing to lose. It went well, and when I moved to a larger possibly hostile audience I knew what to expect... As my employees were already brutally honest and I survived.
Also, if you are wrong, better to learn it now (that's why you learn so much faster as the teacher) than complete life and never know! When I'm wrong I take that as a positive thing, the case where I probably learned more than the student did.
Teaching something to show you are retaining it isn't the best way to go, though teaching something to show you have retained it is better.
Yeah, a lot of people who do have something interesting to say remain silent through fear of something irrelevant being picked up on and used as the basis for abuse. Something I don't recall seeing here.