Charles H. Spurgeon on Psalms 119:70

Their heart is as fat as grease. They delight in fatness, but I delight in thee. Their hearts, through sensual indulgence, have grown insensible, coarse, and grovelling; but thou hast saved me from such a fate through thy chastening hand. Proud men grow fat through carnal luxuries, and this makes them prouder still. They riot in their prosperity, and fill their hearts therewith till they become insensible, effeminate, and self indulgent. A greasy heart is something horrible; it is a fatness which makes a man fatuous, a fatty degeneration of the heart which leads to feebleness and death. The fat in such men is killing the life in them. Dryden wrote, "O souls! In whom no heavenly fire is found,

Fat minds and ever grovelling on the ground."

In this condition men have no heart except for luxury, their very being seems to swim and stew in the fat of cookery and banqueting. Living on the fat of the land, their nature is subdued to that which they have fed upon; the muscle of their nature has gone to softness and grease.

But I delight in thy law. How much better is it to joy in the law of the Lord than to joy in sensual indulgences! This makes the heart healthy, and keeps the mind lowly. No one who loves holiness has the slightest cause to envy the prosperity of the worldling. Delight in the law elevates and ennobles, while carnal pleasure clogs the intellect and degrades the affections. There is and always ought to be a vivid contrast between the believer and the sensualist, and that contrast is as much seen in the affections of the heart as in the actions of the life: their heart is as fat as grease, and our heart is delighted with the law of the Lord. Our delights are a better test of our character than anything else: as a man's heart is, so is the man. David oiled the wheels of life with his delight in God's law, and not with the fat of sensuality. He had his relishes and dainties, his festivals and delights, and all these he found in doing the will of the Lord his God. When law becomes delight, obedience is bliss. Holiness in the heart causes the soul to eat the fat of the land. To have the law for our delight will breed in our hearts the very opposite of the effects of pride; deadness, sensuality, and obstinacy will be cured, and we shall become teachable, sensitive, and spiritual. How careful should we be to live under the influence of the divine law that we fall not under the law of sin and death.