The Church even now is the kingdom of Christ and the kingdom of heaven. Accordingly, even now His saints reign with Him, though otherwise than as they shall reign hereafter; and yet, though the tares grow in the Church along with the wheat, they do not reign with Him. For they reign with Him who do what the apostle says, 'If you are risen with Christ, mind the things which are above, where Christ sits at the right hand of God. Seek those things which are above, not the things which are on the earth'.
If you are pleased with what you are, you have stopped already. If you say, "It is enough," you are lost. Keep on walking, moving forward, trying for the goal.
Wicked sons do not have the Holy Ghost in the same way as do beloved sons, and yet they do have Baptism. So, too, heretics do not have the Church as Catholics have, even though they have Baptism.
We who preach and write, do so in a manner different from which the Scriptures have been written. We write while we make progress.We learn something new every day. We speak as we still knock for understanding...If anyone criticizes me when I have said what is right, he does me an injustice. But I would be more angry with the one who praises me and takes what I have written for Gospel truth than I would be with the one who criticizes me unfairly.
Such then in number and importance are the precious ties belonging to the Christian name which keep a believer in the Catholic Church, as it is right they should ... With you, where there is none of these things to attract or keep me... No one shall move me from the faith which binds my mind with ties so many and so strong to the Christian religion... For my part, I should not believe the gospel except as moved by the authority of the Catholic Church.