The true and proper stimulant for the intellect is truth. There is no sin in being excited by truth. There is no mental injury in such excitement. The more thoroughly the intellect is roused and kindled by a living verity, the more intensely it is affected and energized by it, the better is it for the intellect, and the man.
William G. T. Shedd, Homiletics and Pastoral Theology (New York: Scribner, Armstrong & Co., 1872), 129.