In this essay, I exploit an ambiguity in the concept of self-determination. Self-determination can mean to determine oneself in choices and actions or to determine one's self. The second kind of self-determination leads to our capacity to imagine alternative selves of ourselves, which are to be realized. This creates the basis for a normative conception of self-determination, i.e. a conception that incorporates the aspect of a right or good way to determine oneself. I defend this normative interpretation of self-determination which is illustrated by reference to three theorists: Harry Frankfurt, Thomas Hill Green and John Stuart Mill.