While the foundation of achievement is belief, the pillars are built on discipline. The discipline it takes to do something when it gets hard. It takes discipline to follow a set of plans to build a building. It takes discipline to dig a hole to find a well. It takes discipline to milk cows, or plant and harvest, or write a letter, or program a line of code, or paint the walls, or clean the yard, or say thank you to a stranger. Discipline is the hidden driver of all achievement.