They should be convinced that the best way of demonstrating the truth and efficacy of this teaching is to show that it can provide the solution to present-day difficulties. They will thus win those people who are opposed to it through ignorance of it. Who knows, but a ray of its light may one day enter their minds.
It is not enough merely to formulate a social doctrine. It must be translated into reality. And this is particularly true of the Church's social doctrine, the light of which is Truth, Justice its objective, and Love its driving force.