Their heart is as fat as grease - They are prospered. They have health, property, influence, comforts of all kinds. heaven appears to smile upon them, and it seems as if it were one effect of a wicked course of life to make people prosperous. See Psalm 17:10, note; Psalm 73:7, note.

But I delight in thy law - Though its observance should not be attended by any such results as seem to follow wickedness, though I am poor, emaciated, pale - disappointed, slandered, persecuted - though my lot in life is among the lowly and the despised - yet I will adhere to my purpose to keep thy law. It is, and it shall be, my delight, whatever may be the effects of so observing it. See Psalm 119:35.

Their heart is as fat as grease - They are egregiously stupid, they have fed themselves without fear; they are become flesh-brutalized, and given over to vile affections, and have no kind of spiritual relish: but I delight in thy law - I have, through thy goodness, a spiritual feeling and a spiritual appetite.

Their heart is as fat as grease,.... Or tallow, a lump of it, fat or grease congealed. That is, the heart of the above proud persons, who abounded in riches, were glutted with the things of this world; had more than heart could wish, and so became proud and haughty: or their hearts were gross, sottish, senseless, and stupid, as persons fat at heart are; or as creatures over fat, which have little or no feeling: so these had no knowledge of the law of God, no sense of their duty, no remorse of conscience for sin; their hearts were hardened, and they past feeling, and given up to a reprobate mind; see Isaiah 6:9; The Targum is,

"the imagination of their heart is become gross as fat:''

the Septuagint is, "curdled like milk"; that is, hardened, as Suidas (s) interprets it;

but I delight in thy law; after the inward man; as the apostle did, Romans 7:22; as fulfilled in Christ; as in his hands, as King and Lawgiver; as written upon his own heart; and so yielding a ready and cheerful obedience to it; he delighted in reading the law, in meditating on it, and in observing it.

(s) In voce

{c} Their heart is as fat as grease; but I delight in thy law.

(c) Their heart is indurate and hardened, puffed up with prosperity and vain estimation of themselves.

119:70 Fat - They are stupid and insensible.

70. fat as grease-spiritually insensible (Ps 17:10; 73:7; Isa 6:10).

119:65-72 However God has dealt with us, he has dealt with us better than we deserve; and all in love, and for our good. Many have knowledge, but little judgment; those who have both, are fortified against the snares of Satan, and furnished for the service of God. We are most apt to wander from God, when we are easy in the world. We should leave our concerns to the disposal of God, seeing we know not what is good for us. Lord, thou art our bountiful Benefactor; incline our hearts to faith and obedience. The psalmist will go on in his duty with constancy and resolution. The proud are full of the world, and its wealth and pleasures; these make them senseless, secure, and stupid. God visits his people with affliction, that they may learn his statutes. Not only God's promises, but even his law, his percepts, though hard to ungodly men, are desirable, and profitable, because they lead us with safety and delight unto eternal life.