As for being, it is achieved by faith. The performance is the evidence of faith and not the reason for it.
You do not need to be a new being to perform, but a new being will have performance. As that newness grows and asserts itself with time and maturity, a greater performance is evidenced.
This makes Christianity very easy to fake as it is often easier to perform than to become. The new being demands crucifying self to the cross, which few are willing to do. God is gracious and will wait but clearly there is no point in waiting for everyone.