Mine eyes shall be upon the faithful of the land, that they may dwell with Me he that walketh in the way of the upright, he shall minister unto Me. He that worketh deceit shall not dwell in the midst of My house; he that speaketh lies shall not stand before Mine eyes. In the dawning will I cut off all the wicked of the land, to cut off from the city all the workers of iniquity (Ps. 101:6-8).
That unless a man is interiorly sincere, just, faithful, and upright, he is insincere, unjust, unfaithful, and base, is taught by the Lord in these words:
Except your righteousness shall exceed that of the scribes and Pharisees, ye shall not enter into the kingdom of the heavens (Matt. 5:10).
The “righteousness that exceeds that of the scribes and Pharisees” means the interior righteousness in which is the man who is in the Lord. That he is in the Lord is taught by the Lord Himself in John:
The glory which Thou hast given Me I have given unto them, that they may be one even as we are one, I in them, and Thou in Me, that they may be perfected into one; that the love wherewith Thou hast loved Me may be in them, and I in them (John 17:22-23, 26).
From this it is evident that they are “perfect” when the Lord is in them. These are they who are called:
The pure in heart, who shall see God and, Those who are perfect as is their Father in the heavens (Matt. 5:8, 48).
(Doctrine of Life 84)