Quote: Pope John XXIII

Differences of opinion in the application of principles can sometimes arise even among sincere Catholics. When this happens, they should be careful not to lose their respect and esteem for each other. Instead, they should strive to find points of agreement for effective and suitable action, and not wear themselves out in interminable arguments, and, under pretext of the better or the best, omit to do the good that is possible and therefore obligatory.

Mater et Magistra (1961)