Admittedly, I didn't know what I didn't know. It was hidden in plain sight, and I couldn't see it without help.
Wouldn't the obvious next question be "what else am I missing that I didn't/don't know that I'm missing?". A related question is "what did Ueshiba know and when did he know it?". Both very valid questions if someone is taking a look at "internal strength" in Aikido.