17:5-11 He who puts confidence in man, shall be like the heath in a desert, a naked tree, a sorry shrub, the product of barren ground, useless and worthless. Those who trust to their own righteousness and strength, and think they can do without Christ, make flesh their arm, and their souls cannot prosper in graces or comforts. Those who make God their Hope, shall flourish like a tree always green, whose leaf does not wither. They shall be fixed in peace and satisfaction of mind; they shall not be anxious in a year of drought. Those who make God their Hope, have enough in him to make up the want of all creature-comforts. They shall not cease from yielding fruit in holiness and good works. The heart, the conscience of man, in his corrupt and fallen state, is deceitful above all things. It calls evil good, and good evil; and cries peace to those to whom it does not belong. Herein the heart is desperately wicked; it is deadly, it is desperate. The case is bad indeed, if the conscience, which should set right the errors of other faculties, is a leader in the delusion. We cannot know our own hearts, nor what they will do in an hour of temptation. Who can understand his errors? Much less can we know the hearts of others, or depend upon them. He that believes God's testimony in this matter, and learns to watch his own heart, will find this is a correct, though a sad picture, and learns many lessons to direct his conduct. But much in our own hearts and in the hearts of others, will remain unknown. Yet whatever wickedness there is in the heart, God sees it. Men may be imposed upon, but God cannot be deceived. He that gets riches, and not by right, though he may make them his hope, never shall have joy of them. This shows what vexation it is to a worldly man at death, that he must leave his riches behind; but though the wealth will not follow to another world, guilt will, and everlasting torment. The rich man takes pains to get an estate, and sits brooding upon it, but never has any satisfaction in it; by sinful courses it comes to nothing. Let us be wise in time; what we get, let us get it honestly; and what we have, use it charitably, that we may be wise for eternity.

11. partridge—(1Sa 26:20). Hebrew, korea, from a root, "to call," alluding to its cry; a name still applied to a bustard by the Arabs. Its nest is liable, being on the ground, to be trodden under foot, or robbed by carnivorous animals, notwithstanding all the beautiful manoeuvres of the parent birds to save the brood. The translation, "sitteth on eggs which it has not laid," alludes to the ancient notion that she stole the eggs of other birds and hatched them as her own; and that the young birds when grown left her for the true mother. It is not needful to make Scripture allude to an exploded notion, as if it were true. Maurer thinks the reference is to Jehoiakim's grasping cupidity (Jer 22:13-17). Probably the sense is more general; as previously He condemned trust in man (Jer 17:5), He now condemns another object of the deceitful hearts' trust, unjustly gotten riches (Ps 39:6; 49:16, 17; 55:23).

fool—(Pr 23:5; Lu 12:20); "their folly" (Ps 49:13). He himself, and all, shall at last perceive he was not the wise man he thought he was.