The counsel in Proverbs is not mere toothless moral commonplace, but is associated, in the preceding chapter, with fatherly advice to let thine heart keep my commandments' and to trust in the Lord with all thine heart.' The heart that so trusts will be safely guarded, and only such a heart will be. The inherent weakness of all attempts at self-keeping is that keeper and kept being one and the same personality, the more we need to be kept the less able we are to effect it. If in the very garrison traitors, how shall the fortress be defended? If, then, we are to exercise an effectual guard over our characters and control over our natures, we must have an outward standard of right and wrong which shall not be deflected by variations in our temperature. We need a fixed light to steer towards, which is stable on the stable shore, and is not tossing up and down on our decks. We shall cleanse our way only when we take heed thereto, according to Thy word.' For even God's viceroy within, the sovereign conscience, can be warped, perverted, silenced, and is not immune from the spreading infection of evil. When it turns to God, as a mirror to the sun, it is irradiated and flashes bright illumination into dark corners, but its power depends on its being thus lit by radiations from the very Light of Life. And if we are ever to have a coercive power over the rebellious powers within, we must have God's power breathed into us, giving grip and energy to all the good within, quickening every lofty desire, satisfying every aspiration that feels after Him, cowing all our evil and being the very self of ourselves.
We need an outward motive which will stimulate and stir to effort. Our wills are lamed for good, and the world has strong charms that appeal to us. And if we are not to yield to these, there must be somewhere a stronger motive than any that the sorceress world has in its stores, that shall constrainingly draw us to ways that, because they tend upward, and yield no pabulum for the lower self, are difficult for sluggish feet. To the writer of this Book of Proverbs the name of God bore in it such a motive. To us the name of Jesus, which is Love, bears a yet mightier appeal, and the motive which lies in His death for us is strong enough, and it alone is strong enough, to fire our whole selves with enthusiastic, grateful love, which will burn up our sloth, and sweep our evil out of our hearts, and make us swift and glad to do all that may please Him. If there must be fresh reinforcements thrown into the town of Mansoul, as there must be if it is not to be captured, there is one sure way of securing these. Our second text tells us whence the relieving force must come. If we are to keep our hearts with all diligence, we must be kept by the power of God,' and that power is not merely to make diversion outside the beleaguered fortress which may force the besiegers to retreat and give up their effort, but is to enter in and possess the soul which it wills to defend. It is when the enemy sees that new succours have, in some mysterious way, been introduced, that he gives up his siege. It is God in us that is our security.
