Monsignor Pope on #AdOrientem

He speaks of the "Gamaliel Rule". I like that.
It's kind of the flip side of my attitude.

But a Pharisee in the council named Gamaliel, a teacher of the law held in honor by all the people, stood up…. “Men of Israel, take care what you are about to do with these men. … In the present case I tell you, keep away from these men and let them alone, for if this plan or this undertaking is of man, it will fail; but if it is of God, you will not be able to overthrow them. You might even be found opposing God!” (Acts 5:34-39).

If it is not of God it will not gain adherents? (Though Islam indicates oterhwise.)
Likewise, if it attracts haters - it may be very powerful.