The way to get a mind worth having is to get one well stored with things worth keeping. Of course, the man who has the most illustrations in his head will be the one who will use the most illustrations in his discourses. There are some preachers who have the bump of illustration fully developed; they are sure to illustrate their subject, they cannot help it. There are some men who always see "likes"; they catch a comparison long before others see it. If any of you say that you are not good at illustrating, I reply, "My brother, you must try to grow horns if you have not any on your head." You may never be able to develop any vast amount of imagination or fancy if you do not possess it at the first--just as it is hard to make a cheese out of a millstone--but by diligent attention to this matter you may improve upon what you now are. I do believe that some fellows have a depression in their craniums where there ought to be a bump. I knew a young man, who tried hard to get into this college; but he never saw how to join things together unless he tied them by their tails. He brought out a book; and when I read it, I found at once that it was full of my stories and illustrations; that is to say, every illustration or story in the book was one that I had used, but there was not one of them that was related as it ought to have been. This man had so told the story that it was not there at all; the very point which I had brought out he had carefully omitted, and every bit of it was told correctly except the one thing that was the essence of the whole. Of course, I was glad that I did not have that brother in the college; he might have been an ornament to us by his deficiencies, but we can do without such ornaments, indeed, we have had enough of them already. Finally, dear brethren, do try with all your might to get the power to see a parable, a simile, an illustration, wherever it is to be seen; for to a great extent this is one of the most important qualifications of the man who is to be a public speaker, and especially of the man who is to be an efficient preacher of the gospel of Christ. If the Lord Jesus made such frequent use of parables, it must be right for us to do the same. LECTURE V. THE SCIENCES AS SOURCES OF ILLUSTRATION. _Astronomy._