“Since this is so important, sisters, let us strive to get to know ourselves better and better, even in the very smallest matters, and take no notice of all the fine plans which come crowding into our minds when we are at prayer, and which we think we will put into practice and carry out for the good of our neighbours in the hope of saving just one soul. If our later actions are not in harmony with those plans, we can have no reason for believing that we should ever have put them into practice. I say the same of humility and of all the virtues; the wiles of the devil are terrible; he will run a thousand times round hell if by so doing he can make us believe that we have a single virtue which we have not. And he is right, for such ideas are very harmful, and such imaginary virtues, when they come from this source, are never unaccompanied by vainglory; just as those which God gives are free both from this and from pride.”

—The Interior Castle