Luke 6:30

Jesus Christ does not order us never to refuse a petition: but the meaning of his words is, that we are to give what is just and reasonable, what will be neither injurious to yourself nor your family; for what is unjustly asked, may be justly denied. (St. Augustine, lib. x. chap. 40. de serm. Dom. in Monte.) --- But in this, the sin we commit is often far from trivial; particularly, when to the refusal of a just request, we add also reprehensions and complaints. For why, say we, does he not labour? why has he reduced himself to penury, through his own indolence? --- But, tell me, do you live upon the fruits of your own industry? On the supposition that you do, is it not that you may have some plea to reprehend another for the morsel of bread he begs at your hands? You give him no charitable relief, give him then no contumelious words: if you have no compassion for him yourself, do not prevent others from shewing him commiseration. Abraham, in the number of guests he received, had the honour of receiving under his roof even angels. Let us not, therefore, be strict and unfavourable judges in regard of our suffering and distressed neighbours, lest perhaps we ourselves come to be more severely judged. (St. John Chrysostom collected from hom. xxi. in ep. ad. Rom. --- Hom. xi. in ep. ad. Heb. and hom. ii. de Lazaro.)