1. Don’t plan your life.
In part 2, Piper gives a six-minute autobiographical sketch (10:20–16:45 in the MP3). It includes how he met his wife, went to seminary, and became a professor and then a pastor. The author of Don’t Waste Your Life here underscores another theme: Don’t plan your life because God already has! One could add qualifications to this (e.g., don’t inflexibly plan your life), but I think the main point is sound. (Indeed, Piper qualifies this in part 3.)
2. Learn to see the hidden hand of God when it looks like he is dealing you bitterness day after day.
In part 3, Piper recounts in 4.5-minutes (2:20-6:50) a dark cloud in the pilgrimage of Bethlehem Baptist Church. In 1993, Piper heard a romantic recorded message from one of the BBC staff members to another on staff. After a “hellish” six weeks, the male staff member finally confessed to seven years of adultery. The upshot was that 230 people left the church, which merely survived and didn’t grow for three years. “It was horrible, and the Lord’s hand was on us for good.”