It seems quite a number of meaningful/valuable trading proverbs from experienced traders who just didn't want to keep them as secrets within themselves! Why?
Best way to validate that you have grasped a piece of information is to teach it to someone else. They are sharing their general philosophy with you not their strategy and tactics.
I agree...all The Greats...become teachers/mentors to someone, or the new generation -- it's the cycle, of life, -- what's a shame, is if you reach that age...and have nothing to share,
You must learn this one first before reading any others! "You shouldn't believe everything you read on the Internet" - Abraham Lincoln.
It is naturally the semi-sucker who is always quoting the famous trading aphorisms and the various rules of the game. He knows all the dont's that ever fell from the oracular lips of the old-stagers excepting the principal one, which is: Don't be a sucker! Edwin Lefevre
The markets can be seen like clockwork mechanism with loose parts, that only skillful technicians are able to fix. https://en.wikipedia.org/wiki/Clockwork Charles Babbage's Difference Engine No.1, in Science Museum, London. The first computer.
People who try to beat the market using leverage should remember that sometimes the beating goes the other way.