The Lord withdraws when He is ...

The Lord withdraws when He is denied, and what is taken by the undeserving does not avail them unto salvation, since the saving grace is turned into ashes and holiness departs.
 Cyprian

Quotes from the same author

Whereas there can be but one Baptism, they think they can Baptize; they have abandoned the fountain of life, yet promise the life and grace of the waters of salvation. It is not cleansing which men find there, but soiling; their sins are not washed away, but only added to. That being "born again" does not bring forth sons to God but to the Devil. Born of a lie, they cannot inherit the things which Truth has promised; begotten by the faithless, they are deprived of the grace of faith.
 Cyprian
Persevere in labors that lead to salvation. Always be busy in spiritual actions. In this way, no matter how often the enemy of our souls approaches, no matter how many times he may try to come near us, he'll find our hearts closed and armed against him.
 Cyprian
The world is going mad in mutual extermination, and murder, considered as a crime when committed individually, becomes a virtue when it is committed by large numbers. It is the multiplication of the frenzy that assures impunity to the assassins.
 Cyprian
Peter, in showing that the Church is one and that only those who are in the Church can be saved, said: "In the Ark of Noah certain persons, numbering only eight, were saved by water, which Baptism effects in like manner for you" (1 Peter 3:20). He proves and demonstrates that the solitary Ark of Noah was the figure of the One Church. If, at the time of this Baptism of the world anyone could have been saved without having been in the Ark of Noah, then he who is outside the Church could now be brought to life by Baptism.
 Cyprian
Murder, considered a crime when people commit it singly, is transformed into a virtue when they do it en masse.
 Cyprian