There are other "states of awareness" than the one you are currently in. To swipe from the terminology of Buffy the Vampire Slayer, there are heaven dimensions and hell dimensions - not separate "realities", but ways of experiencing That Which Is Really Here Right Now. You can call them "higher" and "lower" energy worlds if you like, and that's quite close to the concept of valence electrons, in the sense that you can "jump" from one to another, given an expenditure of energy.
The fundamental difference can be summed up thus: in "heaven", the impossible becomes possible, and "hell" the possible becomes impossible. Thus, "heaven" is of course a higher energy state than what you're used to, and "hell" is a lower energy state. Given this, it should not surprise you that - although you can suddenly end up in heaven or hell for no good reason - it takes effort to remain in heaven, and it takes effort to get out of hell.