A person may be full of talk about his own [religious] experiences. But often it is more a bad than a good sign. It is like a tree that is full of leaves that seldom bears much fruit. Or it is like a cloud which, although it appears to promise much fullness of rain, is only wind to a dry and thirsty earth. … Strong, false affections are much more likely to declare themselves than true ones. It is the nature of false religion to be showy and visible as it was with the Pharisees.