Pope John XXIII
Mater et Magistra §194
Mater et Magistra: On Christianity and Social Progress
194 Human life is sacred—all men must recognize that fact. From its very inception it reveals the creating hand of God. Those who violate His laws not only offend the divine majesty and degrade themselves and humanity, they also sap the vitality of the political community of which they are members.
Source: Mater et Magistra (Vatican.va)