What is the meaning of a tree has its roots a stream has its source?

The phrase "a tree has its roots, a stream has its source" suggests that everything has a foundational aspect that sustains its existence. Just as a tree relies on its roots for nourishment and stability, a stream depends on its source for water and flow. This metaphor highlights the importance of understanding the origins and underlying support systems of various entities in nature and life, emphasizing interconnectedness and dependency.