Nothing is permanent. Existence is an amorphous peregrination that doesn't come with a user's guide, and our personalities aren't static. Despite these obvious truths we act as though our identities are etched in stone. Changing yourself is viewed as self-loathing and deceptive. People don't like change, because it means that the future is unknown, but appreciating the present moment is impossible without change.
Are you completely satisfied with who you are? Perhaps you are. If so, you should stop reading this post. But what if you aren't 100% happy with your life?
Western society is addicted to self-esteem. We praise our neighbors for loving themselves despite their flaws. To some extent that's healthy, but ignoring malignant personal defects can be detrimental. No amount of self-congratulation will rid you of bad habits or make you more interesting. Being yourself isn't always effortless.
I used to be averse to the idea of changing myself. I thought, "How can I find true happiness if I'm being someone else?"
But who am I?
Are you interested in the same things you liked as a child? I grew out of action figures and coloring books, but I don't mourn the loss of my childhood personality.
Life is growth. Adulthood isn't the end of our personal histories. Explore your passions. Maybe you'll take a cooking class, or perhaps you'll write the novel you've always dreamt of. You're never too old to grow.
You aren't obligated to stunt your personal development in order to pacify other people's desire for consistency. Those who tell you not to change are being selfish.
Your personal evolution might appear pretentious to observers. It takes work, and new habits don't come easily. There's nothing inherently wrong with trying to be something you are not. Students become doctors. Caterpillars become butterflies. Metamorphosis isn't wrong, but deception is. This is the art of being a genuine fake.