The further implication seems to be that all ideas are therefore useless . This is where I draw the line. I am actually quite comfortable with the proposition that no idea is absolutely TRUE, at least as mediated by language. Language is, in a sense, a system for building models, metaphors of what is going on. It is very important to realize that all we have to communicate with are models of reality.
Some metaphors are incredibly powerful.
They can lead us past manifold distractions into rich and rewarding experiences. Others can lead us nowhere, except to waste great amounts of time and energy. What is important here is to balance the usefulness of a presiding model with a degree of flexibility. That is because the world is in constant flux, and thus the conditions under which a metaphor remains relevant are subject to change. Realizing that all we have are metaphors allows us to adapt, upgrade, or discard the metaphors we use, as needed .