... the Apostle Peter declared that the Church was built by the Holy Spirit. For you read that he said: 'God, Who knows the hearts of men, bore witness, giving them the Holy Spirit, even as was given to us; and He made no distinction between us and them, purifying their hearts by faith' (Acts 15:8-9). In which is to be considered, that as Christ is the Cornerstone, Who joined together both peoples into one, so, too, the Holy Spirit made no distinction between the hearts of each people, but united them.
AmbroseGod drove Cain out of his presence and sent him into exile far away from his native land, so that he passed from a life of human kindness to one which was more akin to the rude existence of a wild beast.
AmbroseNature has poured forth all things for the common use of all men. And God has ordained that all things should be produced that there might be food in common for all, and that the earth should be in the common possession of all. Nature created common rights, but usurpation has transformed them into private rights.
AmbroseIf you offer fasting with humility and with mercy, your bones, as Isaiah said, shall be fat, and you shall be like a well-watered garden (cf. Isa. 58:11). So, then, your soul shall grow fat and its virtues also by the spiritual richness of fasting, and your fruits shall be multiplied by the fertility of your mind, so that there may be in you the inebriation of soberness, like that cup of which the Prophet says: 'Your cup which inebriates, how excellent it is' (Ps. 23:5 LXX)!
Ambrose