It is the building of God's kingdom on earth.

We only want to point out that neutrality is not Christian. Neutrality is indifference, comfort, an attempt to live in lazy, rotten peace, no matter how others fare. Perhaps I will express some platonic sympathy for them, give them a gift from my excess. But all of this is far too little. Every Christian, as an individual and as a whole, as a community, a state, etc., has the duty to prevent evil, help to overcome evil, and has the duty to eliminate the consequences of evil with all their might. This is the building of God's kingdom on earth. Should we have less peace? No, we should have more. There would be less evil if the good were more energetic and if the wicked knew that with every raiding foray they would encounter the unified and persistent resistance of all the good.

(Adolf Kajpr SJ /1902–1959/, On Neutrality, published in "Katolík", October 27, 1946;
quoted according to the book Presence is God's Own Time. Refugium 2021)