The nature of the fruit reflects the nature of the tree.

It's a metaphor used to suggest that:

* Actions speak louder than words: If someone acts in a certain way, it likely reflects their true character, even if they claim to be different.

* Consequences follow actions: The choices we make have direct impacts, both positive and negative.

* Parenting and influence: Children often learn and behave similarly to their parents or other influential figures in their lives.

There are many variations of this proverb, but the core meaning remains the same.