“The casuists submit the decision to the corrupt reason, and the choice of decisions to the corrupt will, in order that all[Pg 268] that is corrupt in the nature of man may contribute to his conduct. 907 But is it probable that probability gives assurance? Difference between rest and security of conscience. Nothing gives certainty but truth; nothing gives rest but the sincere search for truth.
908 The whole society itself of their casuists cannot give assurance to a conscience in error, and that is why it is important to choose good guides. Thus they will be doubly culpable, both in having followed ways which they should not have followed, and in having listened to teachers to whom they should not have listened.”