Do the work even when you don't want to. The speaker compares it to breaking rocks until your hands blister and callus over. That repetitive grind is how you earn the freedom to travel and live on your own terms.
It's doing it when you don't feel like doing it. It's over and over and over again, repetition. It's enduring the mundane tasks of breaking big rocks into little rocks all day long while other people watch you do the same thing all day long with blisters on your hands until they turn into calluses while other people do the exact same thing so that someday you no longer have to do it so that you could travel the world while other people pursue the same interests that you have and the same interests that they want and the freedom to enjoy those things.
