Because that's all you ever can be.
You can't be someone else, you are you.
Be happy with who you are.
Love who you are.
Appreciate who you are and what you can accomplish.
You are amazing.
You are unique.
You are the most beautiful person that you know.
Revel in that.
Shout it out loud and stand up proud.
Celebrate being you, content with who you are and what you represent.
Content, that you are you.