We traditionally think that getting more of what we want is how we get more things of value. But we can also change what we value.
Value is a relationship between the thing of value and the thing that experiences it.
1. If we change the number of things we have that we find valuable we will have more or less of what is valuable to us.
2. If we change what we find valuable we will have more or less of what is valuable to us.
These are two complete different ways of looking at gaining or losing valuable things and we often only look at the first when talking about having more or less things of value.
This is one of the main points in stoic philosphy.
It is also very useful in thinking about economics. If wealth is having more of what we value changing what we value is as useful as getting more of what we currently value.