Here's a breakdown of the meaning:
* "Do what you will" means you are free to act according to your own desires and choices.
* "but harm no one" imposes a crucial limitation on this freedom. It means that your actions should not cause harm to others.
The original quote, often attributed to the philosopher François Rabelais, is a statement about personal liberty with an important ethical caveat. It suggests that true freedom is not absolute, but rather responsible and considerate of others.
The altered sentence, "for and you harm none do what will", might be trying to emphasize the importance of the "harm no one" part, perhaps in a situation where someone is considering acting against their own best interests.
Ultimately, the meaning of the sentence depends on the context in which it is used.