14 Wherefore, since love for God is gradually growing cold today in the hearts of many, or is even completely quenched, We feel that these writings of the "Doctor Mellifluus" should be carefully pondered; because from their content, which in fact is taken from the Gospels, a new and heavenly strength can flow both into individual and on into social life, to give moral guidance, bring it into line with Christian precepts, and thus be able to provide timely remedies for the many grave ills which afflict mankind. For, when men do not have the proper love for their Creator, from Whom comes everything they have when they do not love one another, then, as often happens, they are separated from one another by hatred and deceit, and so quarrel bitterly among themselves. Now God is the most loving Father of us all, and we are all brethren in Christ, we whom he redeemed by shedding His precious Blood. Hence, as often as we fail to return God's love or to recognize His divine fatherhood with all due reverence, the bonds of brotherly love are unfortunately shattered and - as, alas, is so often evident, - discord, strife and enmity unhappily are the result, so much so as to undermine and destroy the very foundations of human society.
Source: Doctor Mellifluus (Vatican.va)