35 How Anselm excelled in this virtue, with what warmth and fidelity he ever maintained perfect union with the Apostolic See, may be seen in the words he wrote to Pope Paschal: "How earnestly my mind, according to the measure of its power, clings in reverence and obedience to the Apostolic See, is proved by the many and most painful tribulations of my heart, which are known only to God and myself... From this union I hope in God that there is nothing which could ever separate me. Therefore do I desire, as far as this is possible, to put all my acts at the disposition of this same authority in order that it may direct and when necessary correct them" ( Ibid . ep. 5).
Source: Communium Rerum (Vatican.va)