A.B. Simpson emphasizes the importance of resting in the Lord, contrasting the old creation's work-first approach with the new creation's call to first enter into God's rest before engaging in labor. He illustrates this with the image of a sailing craft that glides effortlessly over the waters, highlighting the necessity of a steady hand at the helm to maintain direction and power. Simpson encourages believers to cease from their own works and trust in God, as true rest and effectiveness in labor come from a heart that is anchored in Him. He reminds us that while we must actively seek to enter His rest, the ultimate keeping of our peace is the Lord's responsibility. Thus, we are called to labor to abide in His rest, where we find strength and purpose.