In order to develop skills in divination, one must begin by paying attention. If you aren't aware of the energy, you can't get any information from it. The more things you can pay attention to, the more you can divine. The only difference between these is the direction in focus. Using extra-sensory perception involves the use of senses that we don't usually use to perceive external energy.
Accurate divination involves the use of both.
We can aspire to omniscience, but most of us aren't likely to get there in this lifetime. What we can do, however, is increase our attention to both our internal and external environments in order to be able to gather more information with which to sense and interpret our environment. Conceivably, we can divine without anything other than our own senses. Over the centuries, divinatory tools have been developed to help bypass the ego, or conscious mind.