I think, as someone has pointed out, we need to think about the purpose of sila, some examples of which can be found .
The way that a lot of us think about morality is the way that is conditioned into us through various ways: you are a bad religious follower/child/student/part of society (and hence 'immoral')if you don't follow such and such rules. But from the above page, I think that the Buddhist view of sila is quite different.
There were some comments about a "moral compass" and "moral conviction". I think one has to be careful about such ideas, in the sense that one needs to examine one's motivations for desiring such things. How much of the desire is for something to guide you in difficult moral situations, so that you don't need to make the difficult decisions yourself? Instead of thinking through the consequences and implications carefully, it is comparatively easy to just make a decision "because the suttas/monks/Buddha/people on the Internet say so".