Knowledge gives you the power to change or improve things. Change occurs when there is an unwanted or unideal state / event and there is a change to that state. How can you then make a change when you don't have an unwanted or unideal state or event, your actions will be like those who fit the profile or "if you don't know where you are going any road will take you". The same is applicable when you try to change or improve what you don't understand