What does this "resources" mean? "an available means afforded by the mind or one's personal capabilities"?
Its basic meaning seems to be "material or source", but for this, is it one's capability to deal with something?

ex)We should view stress not as an environmental stimulus or as a response but as the interaction of a thinking person and an event. Suppose you are stuck in a traffic jam. Depending on whether you are late for an appoinment or have plenty of time on your hands, you will probably feel very different about your situation...Thus, stres can be defined as a particular relationship between the person and the environment that is regarded by the person as exceeding his or her resources and endangering his or her well-being...