but of course
apply the concepts to different emotions and change them to suit
for example,
if you intend to be the saddest person in the world and have down putting, rock kicking, soaked in rain, sad back ground music aura that creates these ripples of sadness around you.
Then you for example, think of the saddest thing ever to get into that mind state.
then practice letting your self go in that state and letting the emotion control you.
Who know what epic tier sadness you can unlock there, the wisdom of tears.
I jest but its still a good example.
Is hulk simply a retelling of Viking lore. No wonder he and Thor got along so well in that movie.