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When a man is willing to set aside the legitimate appetites of the body to concentrate on the work of praying, he is demonstrating that he means business, that he is seeking with all his heart, and will not let God go unless He answers.

Arthur Wallis (2011). “God's Chosen Fast: A Spiritual and Practical Guide to Fasting”, p.54, CLC Publications
When a man is willing to set aside the legitimate appetites of the body to concentrate on the work of praying, he is demonstrating that he means business, that he is seeking with all his heart, and will not let God go