Almost anything that we are able to direct sustained attention at will begin to loop on itself and bloom.
To take a dark example, if you focus on your anxiety, the anxiety can begin to loop until you hyperventilate and get tunnel vision and become filled with nightmarish thoughts and feelings—a panic attack.
And you do the same thing with joy. If you... See more
If you want to know more about these sorts of mental states, I recommend José Luis Ricón Fernández de la Puente’s recent write-up of his experiences, Nadia Asparouhova on her experiences, and her how-to guide.