In the form of joy, Christianity overcame the world.

From the very beginning, Christianity has been the proclamation of joy, the only possible joy on earth… Without the proclamation of this joy, Christianity is incomprehensible. Only in the form of joy did Christianity overcome the world. And it lost the world when it lost joy, when it ceased to be a witness to joy. The fundamental content of the church is great joy, from which everything else draws and gains its meaning.

(Alexander Schmemann /1921–1983/, Pour la vie du monde; 1969)