We see in these swift and skillful travelers a symbol of our life, which seeks to be a pilgrimage and a passage on this earth for the way of heaven.
Pope Paul VIOf all human activities, man's listening to God is the supreme act of his reasoning and will.
Pope Paul VIMan is suddenly becoming aware that by an ill-considered exploitation of nature he risks destroying it and becoming in his turn the victim of this degradation. Not only is the material environment becoming a permanent menace - pollution and refuse, new illness and absolute destructive capacity - but the human framework is no longer under man's control, thus creating an environment for tomorrow which may well be intolerable. This is a wide-ranging social problem which concerns the entire human family.
Pope Paul VIWithout repeating everything that we have already mentioned, it is appropriate first of all to emphasize the following point: for the Church, the first means of evangelization is the witness of an authentically Christian life, given over to God in a communion that nothing should destroy and at the same time given to one's neighbor with limitless zeal. As we said recently to a group of lay people, โModern man listens more willingly to witnesses than to teachers, and if he does listen to teachers, it is because they are witnesses.
Pope Paul VI