What research on categorization shows clearly is that human categories are very much tied to human experiences and that any attempt to account for them free of such experience is doomed to failure.
- Lakoff (1987), a pag.206

It must be assumed that our bodily experience itself has structure, that it is not an unstructured mush. Structure, after all, cannot arise from something that has no structure whatever. If conceptual structure arises from preconceptual experience, that conceptual experience must itself be structured.
- Lakoff (1987), a pag.267

Since bodily experience is constant experience of the real world that mostly involves successful functioning, stringent real-world constraints are placed on conceptual structure. This avoids subjectivism.
- Lakoff (1987), a pag.268