The denial of ourselves which Christ has so diligently commanded his disciples from the beginning will at last dominate all the desires of our heart. - John Calvin

For what accords better and more aptly with faith than to acknowledge ourselves divested of all virtue that we may be clothed by God, devoid of all goodness that we may be filled by him, the slaves of sin that he may give us freedom, blind that he may enlighten, lame that he may cure, and feeble that he may sustain us; to strip ourselves of all ground of glorying that he alone may shine forth glorious, and we be glorified in him?

Primo meretur eorum perdita obstinatio et indomabilis, ut immensa miseriarum congerie sine fine et modo oppressi omnes exhilarent suis malis, nemo autem eorum misereatur. (Their [the Jews] depraved and indomitable obstinacy merits that none of them be pitied, as they all delight in their evils while being oppressed by a great mass of miseries without end or measure.)

If there had been any unbelief in Mary, that could not prevent God from accomplishing his work in any other way which he might choose. But she is called blessed, because she received by faith the blessing offered to her, and opened up the way to God for its accomplishment.