In the great drama of life the stage-settings are ever shifting and the _dramatis personae_, changing. The success of the actor is to fit in as the play goes on. This he does by adopting ways and methods most appropriate to his surroundings. The problems we face are always the same, but to be efficient our methods of handling them must evolve and adjust themselves to the temper of the age. What should be then the characteristic features of our apostleship among non-Catholics? The neglect of readjustment of our methods in dealing with our separated brethren is the avowed cause of the tremendous waste of energy and the explanation of meagre results. "An enormous amount of energy," said Father Benson,--and he had the experience,--"has been expended uselessly in the past, assaulting positions that are no longer held, and by lack of appreciation of present conditions." In this age of loose thinking and of rapid dissemination of ideas, _aggressiveness_, supported by active propaganda, characterizes every world-wide movement in government, industry, science and religion. Every doctrine, every theory comes into the open and makes a strong bid for our hearing, for our following. Why should not the true doctrine of Christ assume this new shining armour of sane aggressiveness, come more into the open, and throw down the gauntlet to unbelief and indifference everywhere rampant and openly defiant? For, if conviction is the father of devotion, if our belief in the mastery of ideas is genuine, we cannot help but be aggressive. Needless to say we are not asking for vulgar aggressiveness, we are not asking for cheap sneers and attacks on the ignorance and the illogical position of others. By aggressiveness, we mean coming out in defence of truth which it is our privilege and responsibility to possess. Never have times been more inviting for an aggressive Catholicism. The great war has been for Protestantism the acid test. The result is for the Anglican and Evangelical Churches a complete failure,[2] and, as the soldiers said "a wash-out." They have lost their grip on the masses who are rapidly slipping into a religious chaos. The universal disintegration of creeds, strangely combined with a secret thirst for truth and unity now sweeps the English-speaking world. Are not these portentous events that manifest, as "The stirring of the waters," the movement of the Holy Spirit. Our policy of aggressiveness, if it be true and resolute, will find expression in an intelligent, active and persevering propaganda. Propaganda is the dissemination of ideas, with the view of giving them a strong foothold in the mind. The gradual development of the message it carries and the recurrence of its lessons at stated intervals are the principal factors of this great force. To be efficient and successful our propaganda among our non-Catholic brethren will assume two distinct forms: The open and the silent form.