I'm sure you've heard before that the biggest obstacle to getting success on a journey is simply getting started.
“Once you overcome the anxiety of getting started, the rest of the road becomes easy.”
That's a deceiving mindset IMO because when things get hard, you'll be caught off-guard, unprepared, and ready to quit.
Training sessions become challenging or you realize that the self-discipline needed to stay on top of your nutrition might be higher than what you anticipated.
The last thing you want to be in is a perpetual state of starting and quitting things.
The antidote to this mental toughness.