Fallen man is free to choose ...

Fallen man is free to choose what he desires, but because his desires are only wicked he lacks the moral ability to come to Christ. As long as he remains in the flesh, unregenerate, he will never choose Christ. He cannot choose Christ precisely because he cannot act against his own will. His fall is so great that only the effectual grace of God working in his heart can bring him to faith.
Fallen man is free to choose what he desires, but because his desires are only wicked he lacks the moral ability to come to Christ. As long as he remains in the flesh, unregenerate, he will never choose Christ. He cannot choose Christ precisely because he cannot act against his own will. His fall is so great that only the effectual grace of God working in his heart can bring him to faith.
 R. C. Sproul

Quotes from the same author

Without God man has no reference point to define himself. 20th century philosophy manifests the chaos of man seeking to understand himself as a creature with dignity while having no reference point for that dignity.
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 R. C. Sproul
Apostasy occurs when a church leaves its historic moorings, abandons its historic confessional position, and degenerates into a state where either essential Christian truths are blatantly denied or the denial of such truths is widely tolerated.
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 R. C. Sproul
We need the church as urgently as a starving baby needs his mother’s milk.
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 R. C. Sproul
The pursuit of God is not a part-time, weekend exercise. If it is, chances are you will experience a part-time, weekend freedom. Abiding requires a kind of staying power. The pursuit is relentless. It hungers and thirsts. It pants as the deer after the mountain brook. It takes the kingdom by storm...The pursuit of God is a pursuit of passion. Indifference will not do. To abide in the Word is to hang on tenaciously. A weak grip will soon slip away. Discipleship requires staying power. We sign up for duration. We do not graduate until heaven.
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 R. C. Sproul
For a work to be considered good it must not only conform outwardly to the law of God, but it must be motivated inwardly by a sincere love for God.
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 R. C. Sproul