Why Christians do what they do is just as important as what they do. Bad motives ruin good acts.
John PiperGod has given us prayer as a wartime walkie-talkie so that we can call headquarters for everything we need as the kingdom of Christ advances in the world. Prayer gives us the significance of front-line forces, and gives God the glory of a limitless Provider. The one who gives the power gets the glory. Thus prayer safeguards the supremacy of God in missions while linking us with endless grace for every need.
John PiperDoing things in secret that you are ashamed for others to know is practical atheism. God's knowing doesn't count?
John PiperPrayer as a relationship is probably your best indicator about the health of your love relationship with God. If your prayer life has been slack, your love relationship has grown cold.
John PiperAll the different ways God has chosen to display his glory in creation and redemption seem to reach their culmination in the praises of his redeemed people. God governs the world with glory precisely that he might be admired, marvelled at, exalted and praised. The climax of his happiness is the delight he takes in the echoes of his excellence in the praises of the saints.
John Piper