"Hope in God the Creator":
God knows what is my greatest happiness, but I do not. There is no rule about what is happy and good; what suits one would not suit another. And the ways by which perfection is reached vary very much; the medicines necessary for our souls are very different from each other. Thus God leads us by strange ways. We know he wills our happiness, but we neither know what our happiness is, nor the way. We are blind. Left to ourselves we would take the wrong way; we must leave it to him. Let us put ourselves into his hands and not be startled even though he leads us by a strange way, a mirabilis via, as the Church speaks. Let us be sure he will lead us right, that he will bring us to that which is, not indeed what we think best, nor what is best for another, but what is best for us.
From: http://www.catholicculture.org/commentary/otc.cfm?id=1100