James Clear
The 4th pillar
I feel like the way this describes conviction makes it seem similar to willpower. Just like 
James Clear
Atomic Habits
prefers to setup a productive environment rather than humans willing themselves to be productive,

I believe it's keystone to actually just scope possible little things so that you don't have to will yourself unshakable convictions.

Over time these little scoped possibilities will add up to look like a total impossibility to the outside, if the team sticks with something long enough of course lol
Abraham Kim