You say a thing so often and so well that after a time everyone believes it. Even, finally, yourself.

There's nothing so absurd that if you repeat it often enough, people will believe it.

For what a man had rather were true he more readily believes.

If a man repeats a lie over and over, he will eventually accept the lie as truth. Moreover, he will believe it to be the truth.

If you hear nonsense like that often enough for long enough, you begin to believe it.

It's the repetition of affirmations that leads to belief. And ones that belief becomes a deep conviction, things begin to happen.

For aught I know, he may have told that silly tale so oft that he’s come to believe it himself.

It’s the repetition of affirmations that leads to belief. Once that belief becomes a deep conviction, things begin to happen. — MUHAMMAD ALI You

Men who think much want to speak often,

Men are nearly always willing to believe what they wish

In this country all a man need to do is to attain a little eminence and immediately he begins to talk. … But the American people are willing to listen to any one who has attained prominence. The main fact is that we've heard a man's name a great many times; that makes us ready to accept whatever he says.

Let anyone speak long enough, he will get believers.

Even though he wasn’t entirely convinced of the truth of what he was saying, the fact of saying it was curiously reassuring to his mind.

True or false, that which is said of men often occupies as important a place in their lives, and above all in their destinies, as that which they do.