Complete Commentary on the Whole Bible, by Matthew Henry, at sacred-texts.com
(Job 20:1-9) Zophar speaks of the short joy of the wicked.
(Job 20:10-22) The ruin of the wicked.
(Job 20:23-29) The portion of the wicked.
Zophar's discourse is upon the certain misery of the wicked. The triumph of the wicked and the joy of the hypocrite are fleeting. The pleasures and gains of sin bring disease and pain; they end in remorse, anguish, and ruin. Dissembled piety is double iniquity, and the ruin that attends it will be accordingly.
The miserable condition of the wicked man in this world is fully set forth. The lusts of the flesh are here called the sins of his youth. His hiding it and keeping it under his tongue, denotes concealment of his beloved lust, and delight therein. But He who knows what is in the heart, knows what is under the tongue, and will discover it. The love of the world, and of the wealth of it, also is wickedness, and man sets his heart upon these. Also violence and injustice, these sins bring God's judgments upon nations and families. Observe the punishment of the wicked man for these things. Sin is turned into gall, than which nothing is more bitter; it will prove to him poison; so will all unlawful gains be. In his fulness he shall be in straits, through the anxieties of his own mind. To be led by the sanctifying grace of God to restore what was unjustly gotten, as Zaccheus was, is a great mercy. But to be forced to restore by the horrors of a despairing conscience, as Judas was, has no benefit and comfort attending it.
Zophar, having described the vexations which attend wicked practices, shows their ruin from God's wrath. There is no fence against this, but in Christ, who is the only Covert from the storm and tempest, Isa 32:2. Zophar concludes, "This is the portion of a wicked man from God;" it is allotted him. Never was any doctrine better explained, or worse applied, than this by Zophar, who intended to prove Job a hypocrite. Let us receive the good explanation, and make a better application, for warning to ourselves, to stand in awe and sin not. One view of Jesus, directed by the Holy Spirit, and by him suitably impressed upon our souls, will quell a thousand carnal reasonings about the suffering of the faithful.