I mentioned this a while back, but ran into another example, so I thought I’d share.
The difference between the truth and a great truth is that the opposite of a great truth is also true!
The example is in the first two panels, which have nothing to do with the rest of the comic.
PS—I found another example. I think. I found it in A Word A Day for April 8, 2019. The URL is wordsmith.org.
“What is bred in the bone will not come out of the flesh,” implying something deep-rooted cannot be removed. Also recorded in the form “What is bred in the bone will come out in the flesh,” meaning deeply ingrained traits will ultimately reveal themselves.