Whether guile is a sin pertaining to craftiness?

❌ Objection 1 : It would seem that guile is not a sin pertaining to craftiness. For sin, especially mortal, has no place in perfect men. Yet a certain guile is to be found in them, according to 2 Cor. 12:16, "Being crafty I caught you by guile." Therefore guile is not always a sin.

❌ Objection 2 : Further, guile seems to pertain chiefly to the tongue, according to Ps. 5:11, "They dealt deceitfully with their tongues." Now craftiness like prudence is in the very act of reason. Therefore guile does not pertain to craftiness.

❌ Objection 3 : Further, it is written (Prov. 12:20): "Guile [Douay: 'Deceit'] is in the heart of them that think evil things." But the thought of evil things does not always pertain to craftiness. Therefore guile does not seem to belong to craftiness.