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

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

The belief in a thing makes it happen.

Some things are believed because they are demonstrably true, but many other things are believed simply because they have been asserted repeatedly and repetition has been accepted as a substitute for evidence.

When you affirm big, believe big and pray big, putting faith into action, big things happen.

Whatever you believe, with conviction, becomes your reality.

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

The thing always happens that you really believe in; and the belief in a thing makes it happen

The thing always happens that you really believe in and the belief in a thing makes it happen.

If a man says a thing often enough, he is very likely to acquire some sort of faith in it sooner or later.

To believe is to become what you believe

The thing always happens that you really believe in; and the belief in a thing makes it happen.

Believing takes practice.

A reliable way to make people believe in falsehoods is frequent repetition, because familiarity is not easily distinguished from truth. Authoritarian institutions and marketers have always known this fact.