What happens in Philosophy by Percy Bysshe Shelley?

It seems you're asking about a poem by Percy Bysshe Shelley, but there is no poem by him titled "Philosophy." It's possible you're thinking of a different poem or have the title slightly misremembered.

To help me assist you further, could you please provide more information? For example:

* Do you remember any lines from the poem?

* What themes or ideas do you think the poem might explore?

* Do you remember what anthology or collection you might have encountered it in?

Once I have more context, I can help you find the correct poem or suggest some similar works by Shelley that might be what you're looking for.