What does metaphor mean in philosophy?

There is no metaphor in philosophy, because what philosophy wants to do is to give people a clear concept, and metaphor is a rhetorical method in literature, that is, to use one thing to say another, but unlike upstairs, there is a close relationship between the things used in metaphor and the things that are compared. For example, "the sun is like fire" is the attribute of fire (red) to compare the sun, which is naturally just a metaphor. The same is true of metaphor. For example, I have an article that uses figurative words-"She quietly approached him and kissed him with her lips, so he fell into a coma in her kiss ... a snake". This can be said to be a metaphor. It refers to love with snakes. Should we see the connection between them?

When it comes to philosophy, Heraclitus is the most obscure philosopher. But this is not because he used metaphorical words, but because some philosophical concepts are not expressed in the form of concepts (at that time, abstract thinking has not developed to this extent), but in the form of images-people can't step into the same river twice because new water keeps moving forward-this is the philosophical metaphor that people often say, but it is actually the result of visualized abstract thinking.