French phrases and sayings about staying true to yourself?

I want some French writing tattooed on me, as I have lived in France for sometime and want to commemorate this. I like the phrase 'Sois toi-m�me' which means Be yourself, but I was wondering if any native speakers know any other phrases that have a bit more meaning and that sound nice. I was looking for something along the lines of 'Stay true to yourself'. Anyone have any ideas?