Mind believes when it does not know. Our entire life is created on beliefs. Beliefs are a sort of coping mechanism that don't let you face Reality. They are just made-up stories. Meaning, they are not true in your real experience yet you accept them as real. Examples: You've linked a word to yourself and call it your name. - You assume life is tough, boring or beautiful. - You assume that time is real, day and night is real. These are not absolutely true. It's all made-up. So layers and layers of beliefs we accept and agree to without knowing what it actually is. Just because we've been taught this doesn't make them real. That's why, see through the unreality of these beliefs and you're free. This was Gautam Buddha's way too. Byron Katie quote says — when using the mind, your perception is decided by the belief you carry in your head. You cannot see beyond the stories held in the mind. To truly see, you'd need to unlearn, de-condition, empty the mind, and be utterly still within. That's the way all masters know and teach. Basically, empty the cup first, only then reality can enter.