A counsel of perfection noun phrase
Advice that is good or ideal but unfeasible
I need someone who gives me useful advice rather than a counsel of perfection.
I hoped to get practical advice but ended up receiving a counsel of perfection.
This proverb advise you already have your own valuable thing, so you don't need to take the risk of getting something better, which may cause you to lose everything.
To tell someone to leave or stay away from a dangerous situation or trouble
no difference happens to me; whatever
Only foolish people learn from personal experience rather than learning from others' mistakes
To act on the advice offered to you by somebody
The origin of this phrase is not clear.