In July 1989, after yet another crisis in the SSPX, and yet another painful haemorrhage, Archbishop Lefebvre wrote a letter to bishop De Galeratta, who at the time was district superior of South America. In this letter the archbishop identifies and laments two ways in which the devil has managed to tempt Traditional Catholics, and especially the priests and faithful of the SSPX.
Archbishop Lefebvre Forum
So when you take terms like that, you can say, "You see ! If the Council is schismatic, the pope who signed the Council is schismatic, and all the bishops who signed the Council are schismatics, so that we no longer have the right to be with them." This is false reasoning. It's madness, it does not make sense!
by Bishop Hay
The existence of a miracle is a question of fact, to be determined, like other questions of a similar nature, by that kind of evidence which is common to all facts ; but whether a miraculous event is, or is not the work of God, is a question of a peculiar kind, which must be determined by certain rules of judging proper to this subject only.