Pope John Paul II

Concerning the different Christian traditions, Pope JP II said: "All of them in fact have martyrs for the Christian faith. Despite the tragedy of our divisions, these brothers and sisters have preserved an attachment to Christ and to the Father so radical and absolute as to lead even to the shedding of blood. . . In a theocentric vision, we Christians already have a common martyrology. . . . I have already remarked, and with deep joy, how an imperfect but real communion is preserved, and is growing at many levels of ecclesial life. I now add that this communion is already perfect in what we all consider the highest point of the life of grace, martyria unto death, the truest communion possible with Christ who shed his Blood, and by that sacrifice brings near those who were far off (cf. Eph 2:13).

Source: Pope John Paul II  -  Ut Unum Sint, 83-84