The document discusses the importance of self-discipline and how it differs from motivation. It states that while motivation is fleeting, self-discipline is like a muscle that is strengthened over time through taking on small, regular challenges and conquering them. Developing self-discipline allows tasks that once seemed difficult, such as getting out of bed in the morning, to become easy through consistent practice and progression to bigger challenges over time. The document encourages building self-discipline through tackling things one at a time and wishing the reader good luck in their efforts.