If there is your home at - 10 Celsius - - - which is uncomfortably cold---and the memory of a hot fireplace, then there is psychologically a sense of frustration : "I am cold and I should be warm". This is motivation for you to find a way to get warm because warmth is a real thing that you can achieve.
In the say: I am violent sometimes, and I wish to be always non-violent, then this creates an image of non-violence for you to seek to become like yourself.
The difference between warmth and non-violence is that as a human being, you are not able to always be non-violence, nor can you always be happy or congenial all the time. The body---which affects upon the state of your mind---has times when it is hormonally imbalanced, tired, fed up etc. Then, when someone pushes us, we might react violently. Whereas, if you re cold, you can always put on a jumper, turn on the heating, light a fire etc.
In creating a system with the aim of becoming psychologically improved or by psychologixally leaning upon a person (the guru, Furhrer, Saint, Jesus/Buddha etc) or leaning upon an idea that is not human ie, not imperfect---like a set of morals assigned to God---one is creating a gap between the real you and the ideal you. Inwardly, this creates conflict. Imagine if you couldn t heat the room and could only imagine being warm! Wouldn t you feel frustrated?