why must they go through an auditions to prove to us, they are believers

Rom 10:3  For they being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God.
Rom 10:4  For Christ is the end of the law for righteousness to every one that believeth.
Rom 10:5  For Moses describeth the righteousness which is of the law, That the man which doeth those things shall live by them.

As Christian business professionals we must realize that we shouldnt over complicated the Word of Truth, we dont have to put so much restrictions in becoming a belivers, isnt it GOd who will join at the end, so why must they go through an auditions to prove to us, they are believers, will not their lifestyle change be a results of their change to follow Christ.