Henry Ford famously said that whether you believe you can or whether you believe you can't you're always right so you had better believe you can if you want to succeed in life.
Significant experiences during the formative years of our lives can have a huge influence on the formation of our beliefs - both limiting and empowering
These statements aren't 'true' - they're just stories we tell ourselves. These stories however, like any good story can be remarkably convincing and believable