The path of God is a daily cross. No one has ascended into Heaven by means of ease, for we know where the way of ease leads, and how it ends. God never wishes the man who gives himself up to Him with his whole heart to be without concern (that is, concern over the truth). But from this he knows that he is under God's providence -- that He perpetually sends him griefs.
Homily 59 (p. 430).