Faith stands or falls on the truth that the future with God is more satisfying than the one promised by sin. Where this truth is embraced and God is cherished above all, the power of sin is broken. The power of sin is the power of deceit. Sin has power through promising a false future. In temptation sin comes to us and says: "The future with God on his narrow way is hard and unhappy, but the way I promise is pleasant and satisfying." The power of sin is in the power of this lie.
John PiperAll of history is moving toward one great goal, the white-hot worship of God and His Son among all the peoples of the earth. Missions is not that goal. It is the means. And for that reason it is the second greatest human activity in the world.
John PiperTherefore bread was created for the glory of Christ. Hunger and thirst were created for the glory of Christ. And fasting was created for the glory of Christ. Which means that bread magnifies Christ in two ways: by being eaten with gratitude for his goodness, and by being forfeited out of hunger for God himself. When we eat, we taste the emblem of our heavenly foodโthe Bread of Life. And when we fast we say, โI love the Reality above the emblem.โ In the heart of the saint both eating and fasting are worship. Both magnify Christ.
John Piper