It could be a metaphor.
All the depth, all the complexity, everything we feel, everyone we touch, every thought, every action, all the despair, all the fear, all the joy and courage, they all look like an infinite number of different things. But it's not many, it's all one.
Or it could just be a picture I took, of a strange old tree, hollowed out, ancient, and full of layers. I looks like a sea cave to me.
But it's all one tree.