What is the poem, 'Buddha in glory' by Rainer Maria Rilke, about?

He's talking about God and God's son, Buddha, who is the infinite center and everywhere. So the universe is His flesh and fruit which is an illusion and is nothing and so doesn't exist to cling to you, if you are free and know you are Buddha and God, too. The absolute vacuum of being is the eternal that has and will always exist, while endless cycles of the universe are born and die forever in God's unending existence.