“Never attribute to malice what can be explained by stupidity.
Don’t assign to stupidity what might be due to ignorance.
And try not to assume your opponent is the ignorant one, until you can show it isn’t you.”.

(Joao Miranda from Assume Stupidity Not Malice in Meatball Wiki)

“You want to communicate your ideas. You want to be heard, preferably understood, and most preferably agreed with.
It doesn’t work. No matter how you try, they just dont’t get it.
Practice saying only those things that the people around you can hear.”.

(Michael Hill in Only Say Things That Can Be Heard)