Well, it's life wisdom, but it has applications in software development (though not necessarily in a commit message ...)
Overabstraction is generally much worse than underabstraction.
The right level of abstraction is worth it's 'wc -l' in gold.
Murphy was an optimist. Everything that can go wrong, will, but at the most inopportune time (while demoing for the biggest client ever, for example).
The new thing can save you 10% at best, but easily cost you 50% (in delays, unexpected costs, bugs, ...); Prefer boring and established.
Everything has a context. "readability" is not absolute, it depends on your target audience.
Your dev/test machine should be slightly weaker than your user's to guarantee a usable product.
Most people decide if something was brave or foolish only in retrospect.
The best time to plant a tree is 20 years ago, but the next best time is today. That's extremely true for refactoring/code changes/decision making in general.
Praised be those who have nothing to say, and nevertheless remain silent (supposedly a German saying). Keep your descriptions short and to the point, don't go on rambling.
Most people, most of the time, aren't rational, but rationalizing (part of the problem is that we really believe the stories we tell ourselves, even though they are mostly post-hoc rationalization). Is that really why you did that?
Most people like to complain and blame things they can't change, but fear acting on things that they can change.
The game is mostly rigged against you (unless you are the incumbent. Then, the game is rigged by and for you - but you already knew that ...).
History is written by the victors, so take anything you weren't there to witness with a grain of salt -- including science history. (e.g. Barbara McClintock and Danny Shechtman were pariahs until they weren't, but evidence is being whitewashed). Extremely true for office and dev politics. And there are always politics.
Those who cast the votes determine nothing. Those who count the votes determine everything (supposedly by J.G.Stalin). Are you really a decision maker, or just imagine yourself to be?