The Westminster Shorter Catechism describes God's providence like this:
Q11: What are God's works of providence?
A11: God's works of providence are, his most holy,wise, and powerful preserving and governing all his creatures, and all their actions.
The Heidelberg Catechism describes God's providence like this:
Q: 27. What do you mean by the providence of God?
A: The almighty and everywhere present power of God; whereby, as it were by his hand, he upholds and governs heaven, earth, and all creatures; so that herbs and grass, rain and drought, fruitful and barren years, meat and drink, health and sickness, riches and poverty, yea, and all things come, not by chance, but by his fatherly hand.
Calvin believed strongly that God orders our life according to his will. Here are some nuggets from Calvin on the benefits of believing and understanding God's providence.
When dense clouds darken the sky, and a violent tempest arises, because a gloomy mist is cast over our eyes, thunder strikes our ears and all our senses are benumbed with fright, everything seems to us to be confused and mixed up; but all the while a constant quiet and serenity ever remain in heaven.
God's providence does not always meet us in its naked form, but God in a sense clothes it with the means employed.
Therefore the Christian heart, since it has been thoroughly persuaded that all things happen by God's plan, and that nothing takes place by chance, will ever look to Him as the principle cause of things, yet will give attention to the secondary causes in their proper place. Then the heart will not doubt that God's singular providence keeps watch to preserve it, and will not suffer anything to happen but what may turn out to its good and salvation.Calvin cites dozens of Biblical stories throughout this section showing God's care for his saints and his rule over their enemies throughout the Scriptures. Then he says this:
The principle purpose of Biblical history is to teach that the Lord watches over the ways of the saints with such great diligence that they do not even stumble over a stone.
Gratitude of mind for the favorable outcome of things, patience in adversity, and also incredible freedom from worry about the future all necessarily follow upon this knowledge [of God's providence],
If anything adverse happens, straightway [the Christian] will raise up his heart here also unto God, whose hand can best impress patience and peaceful moderation of mind upon us...he has surely benefited greatly who has so learned to meditate upon God's providence that he can always recall his mind to this point: the Lord has willed it; therefore it must be borne, not only because one may not contend against it, but also because He wills nothing but what is just and expedient.
[The Christians] solace is to know that his Heavenly Father so holds all things in his power, so rules by his authority and will, so governs by his wisdom, that nothing can befall except he determine it.
In short...you will easily perceive that ignorance of providence is the ultimate of all miseries; the highest blessedness lies in the knowledge of it.