'Keep thy heart with all diligence; for out of it are the issues of life.'--PROVERBS iv. 23.
'Kept by the power of God through faith unto salvation.'--1 PETER 1. 5.
The former of these texts imposes a stringent duty, the latter promises divine help to perform it. The relation between them is that between the Law and the Gospel. The Law commands, the Gospel gives power to obey. The Law pays no attention to man's weakness, and points no finger to the source of strength. Its office is to set clearly forth what we ought to be, not to aid us in becoming so. 'Here is your duty, do it' is, doubtless, a needful message, but it is a chilly one, and it may well be doubted if it ever rouses a soul to right action. Moralists have hammered away at preaching self-restraint and a close watch over the fountain of actions within from the beginning, but their exhortations have little effect unless they can add to their icy injunctions the warmth of the promise of our second text, and point to a divine Keeper who will make duty possible. We must be kept by God, if we are ever to succeed in keeping our wayward hearts.
I. Without our guarding our hearts, no noble life is possible.
The Old Testament psychology differs from our popular allocation of certain faculties to bodily organs. We use head and heart, roughly speaking, as being respectively the seats of thought and of emotion. But the Old Testament locates in the heart the centre of personal being. It is not merely the home of the affections, but the seat of will, moral purpose. As this text says, 'the issues of life' flow from it in all the multitudinous variety of their forms. The stream parts into many heads, but it has one fountain. To the Hebrew thinkers the heart was the indivisible, central unity which manifested itself in the whole of the outward life. 'As a man thinketh in his heart, so is he.' The heart is the man. And that personal centre has a moral character which comes to light in, and gives unity and character to, all his deeds.
That solemn thought that every one of us has a definite moral character, and that our deeds are not an accidental set of outward actions but flow from an inner fountain, needs to be driven home to our consciences, for most of the actions of most men are done so mechanically, and reflected on so little by the doers, that the conviction of their having any moral character at all, or of our incurring any responsibility for them, is almost extinct in us, unless when something startles conscience into protest.
It is this shrouded inner self to which supreme care is to be directed. All noble ethical teaching concurs in this--that a man who seeks to be right must keep, in the sense both of watching and of guarding, his inner self. Conduct is more easily regulated than character--and less worth regulating. It avails little to plant watchers on the stream half way to the sea. Control must be exercised at the source, if it is to be effectual. The counsel of our first text is a commonplace of all wholesome moral teaching since the beginning of the world. The phrase 'with all diligence' is literally 'above all guarding,' and energetically expresses the supremacy of this keeping. It should be the foremost, all-pervading aim of every wise man who would not let his life run to waste. It may be turned into more modern language, meaning just what this ancient sage meant, if we put it as, 'Guard thy character with more carefulness than thou dost thy most precious possessions, for it needs continual watchfulness, and, untended, will go to rack and ruin.' The exhortation finds a response in every heart, and may seem too familiar and trite to bear dwelling on, but we may be allowed to touch lightly on one or two of the plain reasons which enforce it on every man who is not what Proverbs very unpolitely calls 'a fool.'