John Calvin's Commentary on the Bible

16 (James 3:16)

Verse 16

16For where envying is. It is an argument from what is contrary; for envying, by which hypocrites are influenced, produces effects contrary to wisdom. For wisdom requires a state of mind that is calm and composed, but envying disturbs it, so that in itself it becomes in a manner tumultuous, and boils up immoderately against others.

Some render ἀκαταστασία inconstancy, and sometimes it means this, but as it signifies also sedition and tumult, perturbation seems the most suitable to this passage. For James meant to express something more than levity, even that the malignant and the slanderer does everything confusedly and rashly, as though he were beside himself; and hence he adds, every evil work

- John Calvin's Commentary on the Bible