Venerable Fulton Sheen
“There are two kinds of swords: one that swings outward, and the other, which is thrust inward. One is to harm the neighbor, such as the sword of Peter that hacked off the ear of the high priest’s servant. It was this kind of sword the Divine Master bade be put back into its scabbard. The other kind of sword is the one that cuts out egotism and selfishness and greed. The first sword, which nations hold, creates wars against others; the spiritual sword is a sign of war against ourselves. The less men wage war against the evil in their own breasts, the more they will wage war against their neighbors and nations. The more they battle against their own sins, the less need there is to do battle with the enemy without.”
Source: Sheen Fulton, Guide to Contentment, Alba House, 2010.