What did Dominik fail to accomplish?

Dear Růženka, my little sister,
I wish you a joyful celebration of the feast of St. Dominic. Here I will be preaching on this feast for about the twelfth time. Today I have been here for ten years. This time I have chosen as my theme: what Dominic was unable to achieve. Failures are also part of God's providential plan, the salvation plan that He has for the world and for people. They exist in human relativity, such as time, for example. They are boundaries and limitations. These also existed for the saints.

(Fr. Vladimír Koudelka OP /1919–2003/, correspondence, letter from August 1, 2000)