 The deepest ways you know who you are is that when you are that, you feel a deep sense of alignment, contentment, presence, connection with other humans in your life that matter to you. Above all, a deep sense of connection with yourself. You don't feel that when you're behaving at that time in the way that you are, that you are in any way violating who you really are. It's not a mask, it's not a persona, it's not a role, or a personality, it's you.