Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
Read Chapter 6
Ambrosiaster
AD 400
Paul did not say this because the Corinthians did not know it already. He was rather reawakening their reverence for the divine commandment and bringing them closer to readiness for the kingdom of heaven. Commentary on Paul’s Epistles.
If someone says that he does not want the kingdom of God, only eternal rest, he should not deceive himself. For there are only two places, and not a third. If a person does not deserve to reign with Christ, then he will most assuredly perish with the devil.
Paul does not confine his accusations to a short list of types of sin but condemns all equally. He is not so much getting at particular sins as making a general admonition that will secretly convict anyone who may have such things on his conscience.