Friedrich Heiler was a clever man who lived a long time ago and wanted to understand the different ways that people believed in and experienced God or a higher power.
He noticed that people around the world had different ways of expressing their faith and spirituality, and he thought a lot about how these beliefs and rituals impacted people's everyday lives.
Heiler's research and writing helped people understand and appreciate the diversity of religious experiences and traditions, and he encouraged people to approach differences with respect and curiosity rather than judgement or fear.