11 And I certainly when I then resisted, although I was alone in resistance, was not alone in what I wished, and was not alone in what I advised. Since, then, I am bound by my own words both before God and before all men, I felt that nothing else was allowable or needful for me but to act for myself, because I could not well trust you. I kept back and concealed my grief for a long time; I thought it not right to intimate anything to anybody, now I may no longer dissemble, nor is it open to me to keep silence. For this reason also at the commencement of your reign I did not reply when you wrote to me, because I foresaw that this would happen. Then at last, when you required a letter, because I had not written a reply, I said: This is the reason that I think this will be extorted from him.
Source: Letters (New Advent)