29 The more boldly haters of God and enemies of Christian teaching attack Jesus Christ and the Church He founded, the more readily must priests and all Catholics, by spoken word, popular writings, and good example, resist them, respectful ever of individuals, but defending the truth. And if to do this they must overcome many obstacles, and even sacrifice time and money, they must never refuse, mindful of the maxim that Christian virtue must do and suffer much, but God Himself will reward it most generously with everlasting happiness.
Source: Invicti Athletae (Vatican.va)