"
Tell me if I'm going crazy
But everything you said amazed me
It seems too easy on the ear to
Be something I should adhere to
The person he's talking to has just told him something profound and world-changing. With the inclusion of "too easy on the ear to/ be something I should adhere to", it puts one in mind of perhaps an ideology or religious viewpoint (or lack thereof). It's completely amazed him, it's something he never had thought about or considered to be a possibility to believe about the universe.