What's something that doesn't have value in itself, but when attached to something else, then shows its value?

Question

Just give me a couple of examples of such things. Can be anything--tech product, food, merchandise, whatever. I just can't think of one right away.

Answer 1

Religion

a bible is only a book, until someone reads it and follows those morals, thus bringing one more person into the world who isn't controlled by their urges.