39 These same loving plans and considerations can be put into practice, Venerable Brethren, in that Catholic Action We have so often recommended. The leaders of the people are called to engage in this very noble apostolate which includes all the works of mercy which will be prepared and ready to sacrifice all they have and are for the cause. They must bear envy, contradiction, and even the hatred of many who will repay their labors with ingratitude. They must conduct themselves as "good soldiers of Jesus Christ." They must "run with patience to the fight set before us; looking towards the author and finisher of faith, Jesus Christ." Without a doubt, this is a very difficult contest. Nevertheless, even though a total victory will be slow in coming, it is a contest that serves the welfare of civil society in a most worthy manner.
Source: Editae Saepe (Vatican.va)