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.