Ps 37:1 I believe that this verse is as much a divine command as “You shall not steal” ( Ex 20:15 ). But what does it mean to fret? One person once defined it as that which makes a person rough on the surface, causing him to rub and wear himself and others away. Isn’t it true that an irritable, irrational, and critical person not only wears himself out but is also very draining and tiring to others? When we worry and fret, we are a constant annoyance. This psalm not only says, “Do not fret because of evil men” but leaves no room for fretting whatsoever. It is very harmful, and God does not want us to hurt ourselves or others.
Any physician can tell you that a fit of anger is more harmful to your system than a fever and that a disposition of continual fretting is not conducive to a healthy body. The next step down from fretting is being quick-tempered, and that amounts to anger. May we set it aside once and for all and simply be obedient to the command “Do not fret.”