John Wesley on Job 5:2

Killeth - A man's wrath, and impatience, preys upon his spirit, and so hastens his death; and provokes God to cut him off. The foolish - The rash and inconsiderate man, who does not weigh things impartially. Envy, &c. - I perceive thou art full of envy at wicked men, who seem to be in a happier condition than thou, and of wrath against God; and this shews thee to be a foolish and weak man. For those men, notwithstanding their present prosperity, are doomed to great and certain misery. I have myself seen the proof of this.