It is what you do that validates who you are.
You can tell people who you are but they will accept it only by what they see you do.
People testify of you only by what you do. It is by your fruits that they know you.
You cannot truly claim to be something if you are not doing that thing.
“…Whosoever doeth not righteousness is not of God.” (1 John 3:10)
It is what you practice that validates what you preach.
What people see in you and around you is what they use to describe you.