Resistance and hardship reveal your true character and how badly you want to keep it. The speaker argues that adversity isn't something to avoid but a signal pointing to where you need to grow.
Resistance is an indication of areas you need to change in. I don't know, this is hard for me. This is hard for me. Good, it should be, because guess what's on the other side of that? The confidence that you need. Yeah, the adversity. What's the adversity gonna reveal? It's gonna reveal two things: the true nature of your character and your willingness to preserve that character. Who are you really, and how bad you want to preserve who you really are? That's what adversity will reveal. It will introduce you to yourself.
