Your glorying is not good. Know you not that a little leaven leavens the whole lump?
All Commentaries on 1 Corinthians 5:6 Go To 1 Corinthians 5
Ambrosiaster
AD 400
Just as the sin of one person contaminates many, if it is not dealt with once it is known, so also does the sin of the many who know what is happening and either do not turn away from it or pretend that they have not noticed it. Sin does not look like sin if it is not corrected or avoided by anybody. Commentary on Paul’s Epistles.