Those young men who desire to give themselves to the ministry, or who have already done so, should become familiar with every line of prophetic history and every lesson given by Christ. The mind gains in strength, breadth, and acuteness by active use. It must work, or it will become weak. It must be trained to think, to think habitually, or it will in a great measure lose the power of thought. Let the young minister wrestle with the difficult problems found in the word of God, and his intellect will be thoroughly awakened. As he gives diligent study to the great truths found in the Scriptures, he will be enabled to preach sermons which will contain a direct, definite message, and which will help his hearers to choose the right way.