Prosperity cannot be a proof of God's favor, since it is what the devil promises to those who worship him. (Matt. 4:9)
John PiperThe main reason God has given us minds is that we might seek out and find all the reasons that exist for treasuring him in all things and above all things.
John PiperGod has ordained that our preaching become deeper and more winsome as we are broken, humbled, and made low and desperately dependent on grace by the trials of our lives.
John PiperSin is what you do when your heart is not satisfied with God. No one sins out of duty. We sin because it holds out some promise of happiness. That promise enslaves us until we believe that God is more to be desired than life itself (Psalm 63:3). Which means that the power of sin's promise is broken by the power of God's.
John Piper