This is just what I have thought when I have seen slaves at work – they seem to go through the motions of labor without putting strength into them. They keep their powers in reserve for their own use at night, perhaps.
The turning point in the process of growing up is when you discover the core of strength within you that survives all hurt.
At their core, when things really matter, people see a need to turn to God for strength and protection.
I had no doubts I could go to the pole. I may not be as strong, but I make up for physical strength in other areas, like steadiness and not panicking under stress.