Do not believe in a thing because you have read about it in a book. Do not believe in a thing because another man has said it was true. Do not believe in words because they are hallowed by tradition. Find out the truth for yourself. Reason it out. That is realization.

Don't believe everything you think.

Do not believe in anything simply because you have heard it. Do not believe in anything simply because it is spoken and rumored by many. Do not believe in anything simply because it is found written in your religious books. Do not believe in anything merely on the authority of your teachers and elders. Do not believe in traditions because they have been handed down for many generations. But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it.

Do not believe in anything simply because you have heard it.
Do not believe in traditions because they have been handed down for many generations.
Do not believe in anything because it is spoken and rumored by many.
Do not believe in anything simply because it is found written in your religious books.
Do not believe in anything merely on the authority of your teachers and elders.
But after observation and analysis,
when you find that anything agrees with reason
and is conducive to the good and benefit of one and all
then accept it and live up to it

(Anguttara Nikaya, Vol 1, Kalama Sutta)

My technique is don’t believe anything. If you believe in something, you are automatically precluded from believing its opposite.

Everyone who has to contend with unbelief should be advised that he ought not to take his own unbelief too seriously.

You don’t believe things because they make your life better, you believe them because they’re true.

Believe nothing, no matter who said it, even if I said it, unless it agrees with your own reason and common sense

It seems to me a fundamental dishonesty, and a fundamental treachery to intellectual integrity to hold a belief because you think it's useful and not because you think it's true.

I didn't understand: you don't believe what you believe on purpose. Could you be punished because certain ideas come into your mind?

To Believe is something,and do not live it,is dishonest..

Don't believe everything you hear.Real eyes,realize,real lies.

"The word "belief" is a difficult thing for me. I don't believe. I must have a reason for a certain hypothesis. Either I know a thing, and then I know it - I don't need to believe it"

We should not be too confident in our belief of anything. (Cicero, Tusculan Disputations I.32)