The transition from the Institutes of the monks to the struggle against the eight principal faults.
This fifth book of ours is now by the help of God to be produced. For after the four books which have been composed on the customs of the monasteries, we now propose, being strengthened by God through your prayers, to approach the struggle against the eight principal faults, i.e. first, Gluttony or the pleasures of the palate; secondly, Fornication; thirdly, Covetousness, which means Avarice, or, as it may more properly be called, the love of money, fourthly, Anger; fifthly, Dejection; sixthly, “Accidie,” which is heaviness or weariness of heart; seventhly, κενοδοξία which means foolish or vain glory; eighthly, pride. And on entering upon this difficult task we need your prayers, O most blessed Pope Castor, more than ever; that we may be enabled in the first place worthily to investigate the nature of these in all points however trifling or hidden or obscure: and next to explain with sufficient clearness the causes of them and thirdly to bring forward fitly the cures and remedies for them.
Source: Institutes (New Advent)