People are not aware of the workings of Grace except when there has been some danger,that is, when there has been the beginning of an accident or the accident has taken place and they have escaped it. Then they become aware. But never are they aware that if, for instance, a journey or anything whatever, passes without any accident, it is an infinitely higher Grace. That is, the harmony is established in such a way that nothing can happen. But that seems to them quite natural. When people are ill and get well quickly, they are full of gratitude; but never do they think of being grateful when they are well; and yet that is a much greater miracle! In collective accidents, what is interesting is exactly the proportion, the sort of balance or disequilibrium, the combination made by the different atmospheres of people.
Ref: Questions and Answers 1953