36:18 Some who have labored in the ministry have failed of attaining success because they have not given their undivided interest to the Lord's work. Ministers should have no engrossing interests aside from the great work of leading souls to the Saviour. The fishermen whom Christ called, straightway left their nets and followed Him. Ministers cannot do acceptable work for God and at the same time carry the burden of large personal business enterprises. Such a division of interest dims their spiritual perception. The mind and heart are occupied with earthly things, and the service of Christ takes a second place. They seek to shape their work for God by their circumstances, instead of shaping circumstances to meet the demands of God.