Origen

The Pharisees and the Scribes then would neither enter in, nor hear Him who said, By me if any man enter in he shall be saved; (John 10:9.) nor would they suffer those to enter in, who were able to have believed through the things which had been spoken before by the Law and the Prophets concerning Christ, but shut up the door with every kind of device to deter men from entering. Also they detracted from His teaching, denied all prophecy concerning Him, and blasphemed every miracle as deceitful, or wrought by the Devil. All who in their evil conversation set an example of sinning to the people, and who commit injustice, offending the weak, seem to shut up the kingdom of heaven before men. And this sin is found among the people, and chiefly among the doctors, when they teach men what the Gospel righteousness requires of them, but do not what they teach. But those who both teach and live well open to men the kingdom of heaven, and both enter in themselves, and invite others to enter in. Many also will not suffer those who are willing to enter into the kingdom of heaven, when they without reason excommunicate out of jealousy others who are better than themselves; thus they refuse them entrance, but these of sober spirit, overcoming by their patience this tyranny, although forbidden, yet enter in and inherit the kingdom. Also they who with much rashness have set themselves to the profession of teaching before they have learned, and following Jewish fables, detract from those who search out the higher things of Scripture; these do, as far as in them lies, shut out men from the kingdom of heaven.