Those rare but precious moments when the world becomes a beautiful place to live are called 'peak experiences'. When a peak experience is continuous, it is called a 'peak state' of consciousness. Peakstates of Consciousness are intrinsically positive. In a Peakstate you are operating in ways that you are designed to be like. And this is supposed to be a reality all the time. You become more functional. That is how you can tell that it is a Peakstate because you become more functional. And along with that, you feel better inside. It also adds to your life a feeling or experience. It doesn’t take away a problem. An example of a Peakstate is "Underlying Happiness". In this state, you live with underlying happiness in every moment.  

Those rare but precious moments when the world becomes a wonderful place to live are called 'peak experiences'.

A peak experience is, therefore, a temporary situation where our consciousness is experiencing a more functional way of being.

If this is too abstract, think of a day in your life where everything just went smoothly. Where you woke up in a good mood. Breakfast was easy, work just went well and you came home happy. This is called a peak experience. If this would persist it would be a peak state. The description here matches the "flow"-state, where everything is just working out and life feels in flow to you.