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... the mind was designed not to defend what we want, but to discover what is ultimately true, which should shape our wants and satisfy them more deeply with God. The purpose of the mind is not to rationalize subjective preferences, but to recognize objective reality and to help the heart revel in God.John Piper
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In all of knowable reality, God is unique. He is knowable not like the multiplication table or the table of elements; he alone is knowable as the one totally in control of being known. He is not at the disposal of the human mind. He is known when he wills to be known. Yet he is known in and through created reality, which is known naturally. Therefore the glory of God is exalted most not when we know God apart from observation and reading and study, but when we know God as a result of his free and gracious self-revelation in and through our earnest observation of and meditation on his work and Word in history.John Piper
3
The greatest joy is joy in God. This is plain from Psalm 16:11: "You [God] will make known to me the path of life; in Your presence is fullness of joy; in Your right hand there are pleasures forever." Fullness of joy and eternal joy cannot be improved. Nothing is fuller than full, and nothing is longer than eternal. And this joy is owing to the presence of God, not the accomplishments of man. Therefore, if God wants to love us infinitely and delight us fully and eternally, he must preserve for us the one thing that will satisfy us totally and eternally; namely, the presence and worth of his own glory. He alone is the source of full and lasting pleasure. Therefore, his commitment to uphold and display his glory is not vain, but virtuous. God is the one being for whom self-exaltation is an infinitely loving act. If he revealed himself to the proud and self-sufficient and not to the humble and dependent, he would belittle the very glory whose worth is the foundation of our joy. Therefore, God's pleasure in hiding this from "the wise and intelligent" and revealing it to "infants" is the pleasure of God in both his glory and our joy. .John Piper
4
Our obedience is God's pleasure when it proves that God is our treasure. This is good news, because it means very simply that the command to obey is the command to be happy in God. The commandments of God are only as hard to obey as the promises of God are hard to believe. The Word of God is only as hard to obey as the beauty of God is hard to cherish.John Piper
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Without a spiritual wakefulness to divine purposes and connections in all things, we will not know things for what they truly are.John Piper
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I recall hearing one of my professors in seminary say that one of the best tests of a person's theology was the effect it has on one's prayers.John Piper
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Grace is not simply leniency when we have sinned. Grace is the enabling gift of God not to sin. Grace is power, not just pardon.John Piper