You know the expression - 'is the glass half full or half empty?' - a common idiom meaning to discover whether a person views an event or events with an optimistic or pessimistic point of view. It implies that your answer shows a leaning towards one way of thinking, and perhaps indicate how you view things generally in life. I would argue that in NLP terms, our words shape our thoughts and vice versa so if we say negative words, we believe negative thoughts (which could also be described as negative energy) and the programming we have had since we were children often just repeats a pattern of learnt behaviour.
So if we can learn a behaviour, we can un-learn a behaviour - or to start with, a pattern of speaking. If we change the way we speak about ourselves, for example, we can change the way we think about ourselves and ultimately feel about ourselves.
Amazing, isn't it? So next time you think 'oh I am so rubbish at this', or 'this always happens' - stop and check yourself.