What term did William James use to describe religious experiences that are beyond human expression?

William James described religious experiences that are beyond human expression as "ineffable." This term epitomizes the idea that certain experiences, particularly mystical or profound religious encounters, defy adequate articulation in human language. James believed that the depth and nature of these experiences transcend typical forms of expression, making it challenging for individuals to convey the full essence of what they have encountered.

In contrast, while "noetic" refers to the knowledge or insight gained from such experiences, it does not specifically address their inexpressible nature. "Transient" captures the fleeting quality of these experiences, highlighting that they may not last long, but it doesn’t emphasize the struggle with expression. "Passive," on the other hand, indicates that the individual does not actively control the experience, yet it fails to encapsulate the ineffable characteristic of the experience itself. Thus, "ineffable" stands out as the most fitting term for describing the limitations of human expression concerning these profound religious experiences.