 Nevertheless, the Neuroscience of religion is a growing field of research, searching for specific neurological explanations of mystical experiences.Those rare epileptic patients with ecstatic seizures may provide clues for the neurological mechanisms involved in mystical experiences, such as the anterior insular cortex, which is involved in self-awareness and subjective certainty.A common quality in mystical experiences is ineffability, a strong feeling of certainty which cannot be expressed in words.