A resource is valuable when it generates valueto the firm or the customer. Rare resources are those that are notabundant.
This assertion by the author goes into the idea of resources and what impact they have on others. The author kept this meaning neutral which then allows the reader to be able to interpret the situation in any way. Having the ability to find and use resources in the way of creating and evolving theories can be very beneficial because it allows others to examine resources and their impacts.