Resolved, never to suffer the least motions of anger to irrational beings.
First, notice what Edwards doesn’t say. He doesn’t resolve to abstain from anger. Anger is not wrong or sinful (Eph. 4:26). There are perfectly good reasons to be angry, Edwards knows this. You won’t have to read the Psalms very long before you come across examples of righteous anger. But there are completely sinful things you can do with your anger. What matters is where your anger is directed.
Now notice what he is saying. He resolves to never direct his anger toward irrational beings. “Irrational beings” are not those people who disagree with us (as we may think at times). Rather, Edwards means inanimate, lifeless, non-living objects like lawn-mowers, video games, computers, Christmas tree lights, etc. What then are we to do with anger? Where are we to direct it? Anger toward irrational beings should be fought against, it is pointless anger equal to a child-like temper tamtrum. Anger toward rational beings, like other people, should also be fought against and put to death (Rom. 8:12-13). How? By not repaying evil for evil, but leaving room for the wrath of God. He will repay, not you (Rom. 12:18-21).
To illustrate the foolishness of anger directed at irrational beings, see the video below. But do not only laugh. Remember, let this produce nothing but shame in you, because you all have done things similar to varying degrees. Remember resolution 8?