When Jesus calls his disciples, He awakens them by calling them with a new name. The fisherman with anger management problems becomes the Rock of the church. The sons of Zebede are called the Sons of Thunder.
Those weren’t nicknames. They were identities. How affirming is it for a child to be identified by his father as a warrior? or a daughter identified as a princess? The costumes change, of course. Identities stick.
Your truest identity is a sacred thing. Try it on, for real. Share it with your trusted allies. Remember, God sees you for who you really are.