For that, Jingyi lifted his hand and (gently) rapped his knuckles against Taiki's shoulder.

"What, so you were rushing yourself? Bet that went poorly, huh? Take it from someone who used to do that when I was younger." The unwise rushing, the wanting to be ready for more than he was, the less realistic estimates of his capabilities. Now he was more knowingly fearless, which wasn't always better, but was at least aware of what he was doing and not recklessly dangerous for others, or even himself.

... Minus the whole tendency of being ready to argue with gods on behalf of those he cared for and looked up to.