Marriage and conjugal love are by their nature ordained toward the procreation and education of children. Children are really the supreme gift of marriage and contribute in the highest degree to their parents' welfare.
Pope Paul VIOf all human activities, man's listening to God is the supreme act of his reasoning and will.
Pope Paul VIFor you deal here above all with human life, and human life is sacred; no one may dare make an attempt upon it. Respect for life, even with regard to the great problem of the birth rate, must find here in your Assembly its highest affirmation and its most rational defense. Your task is to ensure that there is enough bread on the tables of mankind, and not to encourage an artificial control of births, which would be irrational, in order to diminish the number of guests at the banquet of life.
Pope Paul VIPeace is not merely the absence of war. Nor can it be reduced solely to the maintenance of a balance of power between enemies. Nor is it brought about by dictatorship. Instead, it is rightly and appropriately called "an enterprise of justice" (Is. 32:7). Peace results from that order structured into human society by its divine founder, and actualized by men as they thirst after ever greater justice.
Pope Paul VIThe command to the Twelve to go out and proclaim the Good News is also valid for all Christians, though in a different way.... the Good News of the kingdom which is coming and which has begun is meant for all people of all times. Those who have received the Good News and who have been gathered by it into the community of salvation can and must communicate and spread it.
Pope Paul VI