Sir James Herschel tells us in a little story, in fragments of his biography, how after his telescopes became famous they were distributed quite widely through Europe, and when he published his great discovery, he began to receive complaints. Men said to him, in angry letters, "We do not see what you see." In his response to them he said: "Perhaps you do not take the care in your observations that I do," and he spoke of one particular thing that is carefully noted. "Do you take care," he said, "of the matter of temperature? The instrument with which I examine the stars must be of the temperature of the stars as nearly as may be, and when I observe on a winter night I place my glass on the lawn at Greenwich, and let it stand there until the instrument comes to be of the temperature of the air. But beyond that," he said, "not only must my instrument be of the right temperature, but I must be. Oftentimes," he said, "I have been out in the winter air for two hours before I would open my glass, because I must come to be of the same temperature as the instrument itself." What a spiritual truth there is here! God's Word the instrument, and the temperature that of the heavens. But we must be of the temperature of that Bible and that heavens! Oh, for the heat of the Gospel to be in the minister of Christ wherever he stands, and then there will be nothing hid from its searching power. I think this subject is often presented in a way to confuse it. We speak of heat in a way not to comprehend precisely what we want; and let me touch upon the point which shows what I mean. When the Saviour was at the well with the woman, it was the love in His heart from which she could not be hid. What a lesson Peter learned that day when our Saviour, in His great interview by the sea, asked him: "Lovest thou me?" and said, "Feed my sheep and my lambs." There was a lesson burned into his heart of the personal love of Christ. I heard Mr. Sankey sing last week "The Ninety and Nine," and he prefaced it by saying that the old hymn was worn out. I was sorry to hear him say that, but there was one accent he gave in singing which was very affecting. When one expostulates with the shepherd that he has ninety and nine with him, he cries out: "It is my sheep." I fancy when Peter came to Pentecost and saw those great crowds before him there was one element of preparation he needed, and the Saviour had taught him how to feed his sheep and feed his lambs, and it lived so in his heart that nothing could be hid from it. I am speaking too long on this matter. But it is a great subject. This Association has a glorious opportunity. There is no cause that comes to us that touches our inspiration and consecration like this society, and the opportunity is such as, in my judgment, the Christian Church never had.