Kinda sad that the key to always being sharp is to make sure you’re always a little stressed, or uncomfortable or on edge or “out of your comfort zone”.
I’m not sure that needs to be a bad thing. I think the takeaway is that there’s good stress and bad stress. That was my conclusion anyhow; a little stress releases cortisol which is a steroid, too much causes burnout.
It’s all in the wording. I think the point is to avoid momentum and autopilot. But challenging yourself and learning new things doesn’t need to mean unwelcome stress or discomfort.