To hear and to listen are not synonyms, there is a slight nuance to these words. One is more active then the other. One can be more involuntary while the other is actively natural and must be mastered to communicate effectively. The differences are, hearing is a process of perceiving sound, while listening is more of a thoughtful attention to what is being said. Hearing is passive, you may hear it but not understand, concentration is not necessary. Listening is active and requires concentration. Approaching the subject of Christianity and having ears. There are many references in the New Testament regarding having ears and not hearing, in some cases having eyes and not seeing. When Jesus spoke the parables of the mustard seed and yeast, both are tiny yet spread everywhere, thus the Kingdom of Heaven is like them. A tiny bit will go an exceptionally long way. However, prior to these parables he also spoke of a prophecy of Isaiah, “though seeing, they do not see, though hearing, they...