One man may have zeal without knowledge while another may have knowledge without zeal, for even the apostle Paul said, For I give testimony that they have a zeal of God, but not according to knowledge (Romans 10:2).
If I could have only one, I would choose the first, but with an open Bible, no one needs to be without knowledge of God’s will and purpose.
The object of this book is to help others know the source of true power, so that both their zeal and their knowledge may increase their service in the Master’s work.
Paul says, All Scripture is given by inspiration of God and is profitable, but I believe one portion has been overlooked, as though it was not practical, but the result is a lack of power in testimony and work.
If we desire to work, not as one that beats the air, but for a definite purpose, we must have this power from on high.
Without this power, our work will be drudgery. With it, our work is a joyful task, a refreshing service.
May God make this book a blessing to many. This is my prayer.
D. L. Moody
Northfield, Mass., May 1, 1881
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