Charles H. Spurgeon on Psalms 37:31

The law of his God is in his heart; none of his steps shall slide. The best thing in the best place, producing the best results. Well might the man's talk be so admirable when his heart was so well stored. To love holiness, to have the motives and desires sanctified, to be in one's inmost nature obedient to the Lord —this is the surest method of making the whole run of our life efficient for its great ends, and even for securing the details of it, our steps from any serious mistake. To keep the even tenor of one's way, in such times as these, is given only to those whose hearts are sound towards God, who can, as in the text, call God their God. Policy slips and trips, it twists and tacks, and after all is worsted in the long run, but sincerity plods on its plain pathway and reaches the goal.