Why We Need the Puritans by J.I Packer taken from A Quest for Godliness by J.I. Packer, copyright 1990, Crossway Books, a division of Good News Publishers, Wheaton Illinois 60187, www.crosswaybooks.org. Page 24.
It has been said that no great work in literature or in science was ever wrought by a man who did not love solitude. We may lay it down as an elemental principle of religion, that no large growth in holiness was ever gained by one who did not take time to be often long alone with God.
The Still Hour or Communion with God, 1974, p. 64, by permission Banner of Truth, Carlisle, PA..