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I. THIS IS THE GREAT PRACTICAL PROBLEM FOR LIFE. It is more especially the question for young people.

1. You are under special temptations not to ask it. There are so many other points in your future unresolved that you are only too apt to put aside the consideration of this one in favour of those which seem to be of more immediate importance. And you have the other temptation, common to us all, of living without any plan of life at all. At your age, judgment and experience are not so strong as inclination and passion; and everything has got the fresh gloss of novelty upon it, and it seems to be sometimes sufficient delight to live and get hold of the new joys that are flooding in upon you.

2. It is worth while for you to ask it. For you have got the prerogative that some of us have lost, of determining the shape that your life's course is to take.

3. You have special temptations to make your ways unclean.

II. WE CAN ONLY MAKE OUR WAY CLEAN ON CONDITION OF CONSTANT WATCHFULNESS. "Take heed to thyself" is the only condition of a pure and noble life. That such a condition is necessary will appear very plain from two considerations. First, it is clear that there must be constant watchfulness, if we consider what sort of a world this is that we have got into. And it is also plain if we consider what sort of creatures we are that have got into it. We are creatures evidently made for self-government. Our whole nature is like a monarchy. There are things in each of us that are never meant to rule, but to be kept well down under control, such as strong passions, desires rooted in the flesh which are not meant to get the mastery of a man. And there are parts of our nature which are as obviously intended to be supreme and sovereign; the reason, the conscience, the will.

III. THIS CONSTANT WATCHFULNESS, TO BE OF ANY USE, MUST BE REGULATED BY GOD'S WORD. The guard on the frontier who is to keep the path must have instructions from head-quarters, and not choose add decide according to his own phantasy, but according to the King's orders. Or, to use another metaphor, it is no use having a guard unless the guard has a lantern. In the Word of God, in its whole sweep, and eminently and especially in Christ, who is the Incarnate Word, we have an all-sufficient Guido. A guide of conduct must be plain — and whatever doubts and difficulties there may be about the doctrines of Christianity, there are none about its morality. A guide of conduct must be decisive — and there is no faltering in the utterance of the Book as to right and wrong. A guide of conduct must be capable of application to the wide diversities of character, age, circumstance — and the morality of the New Testament especially, and of the Old in a measure, secures that, because it does not trouble itself about minute details, but deals with large principles. A guide for morals must be far in advance of the followers, and it has taken generations and centuries to work into men's consciences, and to work out in men's practice, a portion of the morality of that Book. If the world kept the commandments of the New Testament, the world would be in the millennium; and all the sin and crime, and ninety-nine hundredths of all the sorrow of earth would have vanished like an ugly dream. Here is the guide for you, and if you take it you will not err.

IV. ALL THIS CAN ONLY BE DONE EFFECTUALLY IF YOU ARE A CHRISTIAN. My psalm goes as far as the measure of revelation granted to its author admitted; but if a person had no more to say than that, it would be a weary business. It is no use to tell a man, "Guard yourself; guard yourself." Nor even to tell him, "Guard yourself according to God's Word," if God's Word is only a law. The fatal defect of all attempts at keeping my heart by my own watchfulness is that keeper and kept are one and the same. And so there may be mutiny in the garrison, and the very forces that ought to subdue the rebellion may have gone over to the rebels. You want a power outside of you to steady you The only way to haul a boat up the rapids is to have some fixed point on the shore to which a man may fasten a rope and pull at that. You get that eternal guard and fixed point on which to hold in Jesus Christ, the dear Son of His love, who has died for you.

(A. Maclaren, D. D.)

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KJV: BETH. Wherewithal shall a young man cleanse his way? by taking heed thereto according to thy word.

WEB: How can a young man keep his way pure? By living according to your word.