Pearl:Unequally yoked

II Corinthians 6:14:
Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
II Corinthians 6:15:
And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?
II Corinthians 6:16:
And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.
II Corinthians 6:17:
Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,
II Corinthians 6:18:
And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.

The bible tells us to not be unequally yoked with unbelievers (2cor6:14). But how do we know who are the believers, when there exists false brethren, wolves in sheep clothing and Judas Iscariot.

You have to discern yourself who the believers are.

But it is good to hear that the Holy Ghost tells us to separate (2cor6:17) and then God the Father will be a Father unto us (2cor6:18).

This is a way out of trouble, separation.