George Whitefield wrote this after reading The Life of God in the Soul of Man:
"God showed me that I must be born again, or be damned! I learned that a man may go to church, say his prayers, receive the sacrament, and yet not be a Christian. How did my heart rise and shudder, like a poor man that is afraid to look into his account-books, lest he should find himself bankrupt.
Shall I burn this book? Shall I throw it down? Or shall I search it? I did search it; and, holding the book in my hand, thus addressed the God of heaven and earth: 'Lord, if I am not a Christian, or if I am not a real one, for Jesus Christ's sake, show me what Christianity is that I may not be damned at last!'
God soon showed me, for in reading a few lines further, that, 'true religion is a union of the soul with God, and Christ formed within us', a ray of Divine light was instantaneously darted in upon my soul, and from that moment, but not till then, did I know that I must become a new creature."
(Dallimore, p. 73)