It is evil to justify killing (unborn babies) by the happy outcome of eternity for the one killed. This same justification could be used to justify killing one-year olds, or any heaven-bound believer for that matter. The Bible asks the question: "Shall we sin that grace may abound?" (Romans 6:1) And: "Shall we do evil that good may come?" (Romans 3:8). In both cases the answer is a resounding NO. It is presumption to step into God's place and try to make the assignments to heaven or to hell. Our duty is to obey God, not to play God.
John PiperWe ought not speak too long about God with our minds before we turn and speak to God from our heart. We must stir a lot of prayer into the stew of our theology.
John PiperWe need God in ways we do not know. Don't limit your experience of God to what you can think to ask. Ask for the unknown joy.
John PiperI sometimes fear that we have so redefined conversion in terms of human decisions and have so removed any necessity of the experience of God’s Spirit, that many people think they are saved when in fact they only have Christian ideas in their head not spiritual power in their heart.
John PiperThe ultimate difference between God's wisdom and man's wisdom is how they relate to the glory of God's grace in Christ crucified. God's wisdom makes the glory of God's grace our supreme treasure. But man's wisdom delights in seeing himself as resourceful, self-sufficient, self determining, and not utterly dependent on God's free grace.
John Piper