29 From his letters it is abundantly clear how much this apostle trusted in divine grace, besought by humble prayer, to bring his undertakings to fruitful issue. In them he constantly begged for prayers from the Bishop of Rome, from friends whose holiness he esteemed, from nuns whose communities he had either founded, or by wise counsel sought to lead to evangelical perfection; through their intercessions he hoped to receive divine help and grace. Let us quote, as an example, what he wrote to the "revered and dearly loved sisters Leobgith and Thecla, and to Cynehild": "I urge and direct you, beloved daughters, to pray to our Lord frequently, as we trust you do constantly, and will continue to do, as you have in the past . . . and know that we praise God, and our heart's yearning grows that God our Lord, refuge of the poor and hope of the lowly, will free us from our straits and the trials of this evil age, that His word may spread, and the wonderful Gospel of Christ be held in honor, that His grace be not fruitless in me. . . And since I am the last and least of all the ambassadors whom the Catholic and Apostolic Church of Rome has destined to preach the gospel, pray that I may not die without some fruit for that Gospel."
Source: Ecclesiae Fastos (Vatican.va)