Above all - Charity
To conclude this Prologue, it is fitting to recall this pastoral principle stated by the Roman Catechism:
The whole concern of doctrine and its teaching must be directed to the love that never ends. Whether something is proposed for belief, for hope or for action, the love of our Lord must always be made accessible, so that anyone can see that all the works of perfect Christian virtue spring from love and have no other objective than to arrive at love.
Source: Catechism of the Catholic Church (Vatican.va)