I feel like I'm wasting my life. What does the text say is the only true gain in this fleeting existence?

The text in Chapter 8 addresses this feeling by highlighting the fleeting nature of our existence, noting that even those with a long lifespan cannot escape the movement of time. It states that in this transient human body, the only time that is truly gathered as a gain is the time spent in holy stories and talk; all other time is considered a waste. The pursuit of worldly things like a wife, son, wealth, and riches is ultimately unsatisfying, even if one were to gain the entire earth. Therefore, the only true benefit is achieved when one realizes this and dedicates time to spiritual matters, which requires practice to gain experience and faith.