If you suffer from low self-esteem or self-belief, you will simply sabotage your ability to get what you want. If you don’t really want something or feel you don’t deserve it or indeed can’t be bothered, your thoughts will be counter-productive and you will end up with a self-fulfilling prophecy of ‘I knew I would never be able to get that job’ or ‘I knew that job was already someone else’s, even before I applied for it’. This is simply an assumption you make with no evidence, when you don’t get what you want.