This is an essay book. Gentlemen, it would be impossible to begin this course of lectures without expressing my acknowledgments to the Theological Faculty of this University for the great honour they have done me by inviting me to occupy this position. I cannot help feeling that it is perhaps a greater honour than I was entitled to accept; and I cannot but wish that the preaching of the old country were to be represented on this occasion by some one of the many ministers who would have been abler than I to do it justice. It is with no sense of having attained that I am to speak to you; for I always seem to myself to be only beginning to learn my trade; and the furthest I ever get in the way of confidence is to believe that I shall preach well next time. However, there may be some advantages in hearing one who is not too far away from the difficulties with which you will soon be contending yourselves; and the keenness with which I have felt these difficulties may have made me reflect, more than others to whom the path of excellence has been easier, on the means of overcoming them. I warmly reciprocate the sentiments which have led the Faculty to come across the Atlantic the second time for a lecturer, and the liberality of mind with which they are wont to overstep the boundaries of their own denomination and select their lecturers from all the evangelical Churches. It is the first time I have set foot on your continent, but I have long entertained a warm admiration for the American people and a firm faith in their destiny; and I welcome an opportunity which may serve, in any degree, to demonstrate the unity which underlies the variety of our evangelical communions, and to show how great are the things in which we agree in comparison with those on which we differ.