In this Gospel we find that our Lord twice uses this image of a tree and its fruit. In the Sermon on the Mount He applies it as a test to false teachers, who hide, beneath the wool of the sheep's clothing, the fangs and paws of ravening wolves. He says, 'By their deeds ye shall know them; for as is the tree so is its fruit.' That is a rough and ready test, which applies rather to the teacher than to his doctrine, but it applies, to some extent, to the doctrine too, on the hypothesis that the teacher's life fairly represents it. Of course, it is not the only thing that we have to take into account; but it may prick many a bladder, and unmask many an error, and it is the way by which the masses generally judge of systems and of their apostles. A saintly life has more power than dusty volumes of controversy. But in our text Christ applies the same thoughts in rather a deeper fashion. Here the lesson that He would have us draw is of the connection between character and conduct; how what we do is determined by what we are, and how, not of course with the same absolute regularity and constancy, but still somewhat in the same fashion as the fruit is true to the tree, so, after all allowance made for ups and downs, for the irregular play of will and conscience, for the strife that is waged within a man, for the temptations of external circumstances, and the like--still, in general, as is the inner man, so is the outward manifestation. The facts of a life are important mainly as registering and making visible the inner condition of the doer. Now, that seems very elementary. Everybody believes that 'out of the heart are the issues of life,' as a wise man said long ago, but it is one of the truths that, if grasped and worked into our consciousness, and out in our lives, would do much to revolutionise them. And so, though it is a very old story, and though we all admit it, I wish now to come face to face with the consequences of this thought, that behind action lies character, and that Doing is the second step, and Being is the first. I. I would ask you to notice how here we are confronted with the great problem for every man.