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.'
That guarding is plainly imposed as necessary, by the very constitution of our manhood. Our nature is evidently not a republic, but a monarchy. It is full of blind impulses, and hungry desires, which take no heed of any law but their own satisfaction. If the reins are thrown on the necks of these untamed horses, they will drag the man to destruction. They are only safe when they are curbed and bitted, and held well in. Then there are tastes and inclinations which need guidance and are plainly meant to be subordinate. The will is to govern all the lower self, and conscience is to govern the will. Unmistakably there are parts of every man's nature which are meant to serve, and parts which are appointed to rule, and to lot the servants usurp the place of the rulers is to bring about as wild a confusion within as the Ecclesiast lamented that he had seen in the anarchic times when he wrote--princes walking and beggars on horseback. As George Herbert has it--
Give not thy humours way;
Then, further, that guarding is plainly imperative, because there is an outer world which appeals to our needs and desires, irrespective altogether of right and wrong and of the moral consequences of gratifying these. Put a loaf before a starving man and his impulse will be to clutch and devour it, without regard to whether it is his or no. Show any of our animal propensities its appropriate food, and it asks no questions as to right or wrong, but is stirred to grasp its natural food. And even the higher and nobler parts of our nature are but too apt to seek their gratification without having the license of conscience for doing so, and sometimes in defiance of its plain prohibitions. It is never safe to trust the guidance of life to tastes, inclinations, or to anything but clear reason, set in motion by calm will, and acting under the approbation of the Lord Chief Justice, Conscience.'
But again, seeing that the world has more evil than good in it, the keeping of the heart will always consist rather in repelling solicitations to yielding to evil. In short, the power and the habit of sternly saying No' to the whole crowd of tempters is always the main secret of a noble life. He that hath no rule over his own spirit is like a city broken down and without walls.'
