Frequently people stop because something is uncomfortable. People will often shy away from a challenge because it is socially uncomfortable (what people might think or say if you tried), physically uncomfortable (a challenging skill or strenuous) or mentally uncomfortable (trying to solve a difficult problem).
If only people remembered that you always have to get through that uncomfortable stage before you can get to the unstoppable stage.
If you can remember, you were usually uncomfortable when you started doing anything for the first time. It could have been putting your hand up in class, or speaking in a meeting (social), learning a new sports skill (physical) or learning your times tables (mental).
The trick to remember is that it always gets better and easier if you put in the effort and accept greater guidance from someone who knows how. Then if you keep trying, practicing and developing, you will start to be quite good at it (witness anyone progressing through times tables or solving a Rubik’s Cube).
Then if you practice even more, you can become unstoppable. What a great feeling that is. To know you are one of the best in a certain endeavour.
That period of being uncomfortable is the way the Universe checks to see who really is interested in progressing further.
To progress from Uncomfortable to Unstoppable, you need Action Not Words.
Go do it!