While some things will always be kept in the privacy of one's own mind, I think it is a noble goal to try one's best to only have one face. I've actually paid a fair amount of attention to this over the past couple of years, to be mindful of when I feel that I am not speaking with someone's "inner face" but only interacting with their outer face. It is very common, indeed very human, but it's not the conversation that I want to have. Bringing my inner face to the surface has also made me a whole lot more relaxed. I speak my mind and do not spend energy and effort thinking of how it needs to be filtered for the outside world to accept it. If they like it, good. If not, too bad. Surely I may have turned off some people to whom I've been perhaps a little too direct with what I think and what I believe. For the rest, however, I've found that it helps enhance and deepen the relationship with the person. And in the end, it is the number of good relationships that are worth counting in the end.