Why should we not underestimate God's sovereignty?
We should not underestimate God's sovereignty because it governs even the smallest details—which sperm fertilizes which ova, how lives intersect, marriages form—and it is by His grace He chooses us. Every person is a sovereign act of God, so we must never sell short His sovereignty.
Les explains that the sovereign God supernaturally predetermines which sperm fertilizes which ova, making every person a sovereign act of God. He sees the same sovereignty in everyday life—how he and his wife crossed paths, fell in love, and spent 43 years together—calling it an act of God. He advises never selling short God's sovereignty, noting it was only by His grace that He reached down and chose us. For unbelievers, he says not to worry about being chosen; believe the gospel, and God will reveal these truths little by little.