The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds. 5 We demolish arguments and every pretension that sets itself up against the knowledge of God, and we take captive every thought to make it obedient to Christ 2 Cor.10:4,5
Lillie-Put 
Our own.
And yet Paul is also speaking about needing to bring church discipline when he comes to the Corinthian Church. I wonder if he was going to use spiritual weapons to change someone else’s mind too and is that even possible?