“The law of his God is in his heart; none of his steps shall slide.”
Here is a man who has God’s Word in his heart and you notice that he takes pains about his steps. A step is a very little thing. We must take a good many hundreds of steps to walk a mile, but good men take notice of little things. The man who has the Law of God in his heart is scrupulous and conscientious about thoughts and imaginations, as well as about words and actions. Hence, the promise in the text is suited to him, for it is a promise about little things—”None of his steps shall slide.” I recollect—no, I hope it is so with me still—but I recollect that just after my conversion, I used to be almost afraid to put one foot before the other lest I should put it down in the wrong place. And often have I paused, when I was speaking, for fear I would not say the right word. That holy caution is most commendable in all who have it. I wish that many more had it. What a hop, skip and jump some men’s lives are! Not only do they not look before they leap, but they do not even seem to look after they have leaped! They rush on blindly and heedlessly, presuming where they ought to be praying and self-confident where they ought, with deep repentance, to be humbling themselves before God! Our old proverb says, “Take care of the pence, and the pounds will take care of themselves.” And the same rule applies to our actions. If we are careful about our little actions, the great ones will be pretty sure to be right. Oh, that we were all very guarded about how we act at home! Oh, that we were careful about our speech as we sit around the tea table! Such a little thing as that may do almost infinite mischief. I believe the worst evils in the world arise out of little things. It is said that the seed of mischief is as small as a gnat’s egg, and so it is. Then, look well to those gnat’s eggs, lest they hatch out far greater evils.
When David says, “The law of his God is in his heart; none of his steps shall slide,” what does he mean by that last clause? He means that God will guide him. As he has God’s Law in his heart, he will have God’s guidance for his steps! In the 23rd verse, David says, “The steps of a good man are ordered by the Lord, and he delights in His way.” When a man really carries God’s Law in his heart, God will take care that he does not carry that Law into any evil place, for, as David goes on to say, “the Lord upholds him with His hand.” There will come to every man, whoever or whatever he may be, sudden assaults of temptation—but if the Law of his God is in his heart, he will be forewarned and forearmed against them! There will also come the long sieges of temptation and many a man has fallen by little and little. But if the Law of his God is in his heart, he will be safe against even them. C.H. Spurgeon