also: にんをみてほうをとけ
expression
adapt your message to your audience
Proverb advising that one should tailor one's speech or teaching to the listener's character, understanding, or circumstances.
人を見て法を説けというように、相手に合わせて話し方を変えることが大切だ。
As the saying goes, 'Adapt your message to your audience,' it's important to change how you speak depending on the person.
A traditional Japanese proverb. The exact origin is uncertain, but it reflects a common teaching in Buddhism and rhetoric about tailoring one's message to the listener.