To walk the walk means to have skill, ability, or experience in a given activity.
To show that something is true through your actions.
Back up one’s talk with action.
1. You can preach all you want but you should know to walk the walk.
2. He likes to talk about what is right but he ought to walk the walk himself.
3. There are few that are wise enough to talk the talk and walk the walk.
4. You certainly talk the talk but can you walk the walk?
confirm, demonstrate, establish, exhibit, expose, flaunt, indicate, manifest, prove, test, validate