In Albert Camus’ novel the Fall, Camus wrote this line in reference to Clemence’s collision between his self and his over inflated self-image. There is a lot to be understood from this single line.
On its face, mind the pun, it can be about taking care of yourself. Not just your literal face, but your soul, your worth and your self as a whole. You are responsible for you. Buck up. clean up. Be responsible for the face you put forward and the person you put through the day.
Camus, of course, meant this a little differently.
In Camus’ novel, the protagonist is ego-centric, and self-inflated. He is responsible for his self, no one else, and he will have to live with that.
We all have history and a past. We all have skeletons in our closet. Who we are, at some point in the life of a man, is a reflection of what we do. When you reach that age, your face will reflect what you’ve done. By then, you should be proud of the choices you’ve made and the things you’ve done, because you and you alone is responsible for your face.