The word "authentic" has its roots in the Greek word authentes. It is composed of two parts: autos — the self — and hentes — the doer or the being. So "authentes" means "one acting on one's own authority".
So, it's not about being the same person in every context. It has more to do with deciding how we respond to the circumstances and the environment instead of just reacting.
The word authority has its roots in the Latin word "auctor" meaning "leader" but also "author". And I love this idea of being the author of my self and of my life.
It is my life, so even if it may not seem so sometimes, I am the protagonist of my story. However, I am not always its author. Anytime I allow someone or something else to choose my words or actions, I give away the power to write my story.
I found out that looking at my life from the perspective of the author is incredibly helpful.
Not only does it allow me to take a step aside and see what's happening from a different perspective and discover new possibilities. It is also a way to claim back my inner authority.
Being the author of this story, what do I want the protagonist to do in this situation?
It's not an easy thing to do, not on your own, at least. When you are immersed in the story, it's hard to be the protagonist and the author simultaneously. That's why I have coaches and mentors. They help me see things from the perspective of the author. And from there, I can make better and more authentic choices.