Clearly you can't be just/fair, peaceful, moral, good etc if you fall in love with any of these qualities as ideas. 
Any action from this place will never be whole, pure, right for it carries the weight and taint of your own becoming-identification.
The function of fixation/becoming actively ruins that which it is trying to become.
And of course all codes exist for those who aren't (yet) sensitive enough in perception (a.k.a. not present and therefore full of themselves) to do the right unbiased thing without the code.
But adjustment/modification of thought and thought-led behaviour is not true goodness or virtue, for it misses the active wisdom that comes from presence.