All this can only be done effectually if you are a Christian. My psalm does not go to the bottom; it 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 by which to hold in Jesus Christ, the dear Son of God's love, who has died for you.
You want another motive to be brought to bear upon your conduct, and upon your convictions and your will mightier than any that now influence them; and you get that if you will yield yourself to the love that has come down from heaven to save you, and says to you, If you love Me, keep My commandments.' You want for keeping yourself and cleansing your way reinforcements to your own inward vigour, and you will get these if you will trust to Jesus Christ, who will breathe into you the Spirit of His own life, which will make you free from the law of sin and death.'
You want, if your path is to be cleansed--the youngest of you, the most tenderly nurtured, the purest, the most innocent wants--forgiveness for a past path, which is in some measure stained and foul, as well as strength for the future, to deliver you from the dreadful influence of the habit of evil. And you get all these, dear friends! in the blood of Jesus Christ that cleanses from all sin.
So, standing as you do in the place where two ways meet, and with your choice yet in your power, I beseech you, turn away from the broad, easy road that slopes pleasantly downwards, and choose the narrow, steep path that climbs. Better rocks than mud, better the painful life of self-restraint and self-denial than the life of pleasing self.
Oh! choose the better portion, choose Christ for your Leader, your Law, your Lord! Trust yourselves to that great sacrifice which He made on the Cross, that all the past for you may be cleansed, and the future may be swept clear; and, so trusting, be sure He will be with you, to keep you and to guide you into the path which His own hand has raised above the filth of the world; the path of holiness, along which you may walk with feet and garments unstained till you come to Zion, with songs and everlasting joy upon your heads,' and bless Him there for all the way by which He led you home.