Jesus spoke many times about the seed of the mustard plant. The mustard seed is the smallest of all seeds but has a mysterious quality: When it grows, it becomes the largest plant.

God is invisible, and the universe is His most visible creation. The universe is the tree. God is the seed. God is the unrevealed. The universe is that which has been revealed. And, if the universe exists, then the seed exists as well. How can there be a tree without the seed?

However, the seed must die. Only then can it become a tree. That is why God is everywhere, just as the seed is present within the entire tree. However, you cannot find the seed. The seed has died within the tree. It has become the tree itself. God has become the universe. He is not separate from it.

[Excerpt from the text on the back cover of the edition]