Tennyson said, "That which we are, we are." Locke said, "Whatsoever is, is." Or, in the immortal words of Popeye the Sailor Man, "I yam what I yam and that's all what I yam."
And yet, we are capable of change. Change happens every day. Change is inevitable, unstoppable, the only constant.
Ah, the good ol' yin and yang of existence. I've bumped my head into this ceiling so many times before: immutable nature vs. constant change. Like light, I function both as a particle and a wave. I am both matter, subatomic bonds that form, deteriorate, and reform, and energy that cannot be created or destroyed, just changed from one form to another.
If I want to change my life, change is right here, available for the taking. But, change must be reconciled with the essential nature of my being, my immutable self. So many times I have tried to be something I am not. It never works.
I continually strive to be a better person, but I don't want to be someone I am not. People give and people take, people come and people go. Through it all, I'll be OK as long as I am who I am.