C.H. Spurgeon emphasizes the principle of divine recompense, illustrating that by caring for others, particularly the poor and children, we invite God's care and blessings upon ourselves. He encourages believers to shift their focus from self to serving others, suggesting that true fulfillment comes from selflessness and love for Jesus. Spurgeon assures that as we pour out our resources to help those in need, God replenishes our souls, creating a cycle of blessing and refreshment. He highlights the promise that when we water others, we too will be watered, reinforcing the importance of generosity and compassion in the Christian life.