Gregg Allison, Ph.D.: "Historical Theology," Ch. 13-Providence in the Mi...

[1]Providence in the Middle Ages 

Anselm. “If everything that exists derives its existence from God’s knowledge, then Gid is the Creator and author also of evil works and, by inference, unjustly punishes the wicked…that the goodness which consists of uprightness is really something that exists, whereas the evil which is called unrighteousness lacks existence entirely…everything that has existence owes its being at all to God, who is the source of all uprightness, but not of unrighteousness. Therefore, although Gis a factor in all that id done by a righteous or unrighteous will in its good and evil acts, nevertheless, I the case of its good acts he effects both their existence nd their goodness, where in the case of its evil acts he causes them to be, but not to be evil.” Compatibility of the Foreknowledge, Predestination and Grace of God with Human Freedom, in Anselm, 447. 

Aquinas. “The existence of every creature depends on God, so that not for a moment could it exist, but would fall into nothingness were it not kept in existence by the operation of divine power…We must say that all things are subject to divine providence, not only in general but also in their individual selves…For since every agent acts for an end, the ordering of effects towards that end extends as far as the causality of the first agent extends…But the causality of God who is the first agent, extends to all being [everything that exists]…Hence all things that exist in whatever manner are necessarily direct by God towards some end.” Summa Theologica, pt.1, q.104, art.1. See part 1, q.22 and q,103. 

[1]Providence in the reformation and post-reformation period 

Luther. “God the Father initiated and executed the creation of all things through the Word; and now he continues to preserve his creation the Word, and that forever and ever. He remains with his handiwork until he sees fit to terminate it…Hence, as heaven, earth, sun, moon, stars, man and all living things were created in the beginning through the Word, so they are wonderfully governed and preserved through the Word.” Sermons on the Gospel of St. John, 1-4, LW, 22:26. 

Calvin. “This means that we are not at all hindered by God’s eternal decrees either from looking ahead for ourselves or from putting all our affairs in order, but always in submission to his will. The reason is obvious. For he who has set the limits to our life has at the same time entrust to us its care; he has provided means and helps to preserve it; he has also made us able to foresee dangers’ that they may not overwhelm us unaware, he has offered precautions and remedies….The Lord has inspired in men the arts of taking counsel and caution, but which to comply with his providence in the preservation of life itself.” Institutes LCC, 1:216. Also, see 1:198-199, 200, 202, 207, ad.loc.