Think before you speak. Read before you think.

Think before you speak. Read before you think. This will give you something to think about that you didn't make up yourself

Remember, your mind is like a parachute: If it isn’t open, it doesn’t work. So keep an open mind!

Avant d'ouvrir la bouche, assure-toi que ce que tu vas dire est plus beau que le silence.

Merely having an open mind is nothing. The object of opening the mind, as of opening the mouth, is to shut it again on something solid.

Keep an open mind - but not so open that your brain falls out.

Think before you speak. Read before you think. This will give you something to think about that you didn’t make up yourself — a wise move at any age, but most especially at seventeen, when you are in the greatest danger of coming to annoying conclusions.

Making yourself mentally open is very fundamental and very crucial, because this is something that is immediately in your hands. Your energy is not in your hands; you don’t know how to open it. Even your physical body, you don’t know how to keep it open, but your mind is something that you can consciously open.

فكر قبل أن تتكلم، واقرأ قبل أن تفكر

An open mind, in questions that are not ultimate, is useful. But an open mind about the ultimate foundations either of Theoretical or of Practical Reason is idiocy. If a man's mind is open on these things, let his mouth at least be shut. He can say nothing to the purpose. Outside the Tao there is no ground for criticizing either the Tao or anything else.

Keep your eyes and ears wide open - and your mouth closed, if you wish to acquire the habit of prompt decision. Those who talk too much do little else. If you talk more than you listen, you not only deprive yourself of many opportunities to accumulate useful knowledge, but you also disclose your plans and purposes to people who will take great delight in defeating you, because they envy you.

Learn us all the refinement and education that there's a better use for the mouth than running private opinions through it.

You must use your mind to get things off your mind.

Listen, I know you run your mouth so your mind can rest.