On the lips of the catechist the first proclamation [kerygma] must ring out over and over: “Jesus Christ loves you; he gave his life to save you; and now he is living at your side every day to enlighten, strengthen and free you.” This first proclamation is called “first” not because it exists at the beginning and can then be forgotten or replaced by other more important things. It is first … because it is the principal proclamation, the one which we must hear again and again in different ways, the one which we must announce one way or another throughout the process of catechesis [teaching], at every level and moment.
We must not think that in catechesis the kerygma gives way to a supposedly more “solid” formation. Nothing is more solid, profound, secure, meaningful and wisdom-filled than that initial proclamation. (Pope Francis. Evangelii Gaudium. 164-165)