Terrific post, Yann!
So many people never reach any form of success because they give up long before any kind of momentum can begin to be generated.
Momentum is an unbelievably powerful thing. But, as you say, we need to constantly be adding, building, generating more momentum. The more we add, they more momentum we generate, and eventually we have created so much momentum that we cannot be stopped.
The most difficult part of generating momentum is always the beginning; getting the ball to start rolling.
You are spot on! The only way to succeed is to keep adding and adding and adding, and eventually you have created a pretty amazing thing.