Can 'ser' be used to describe what seems to be a temporary condition or state ?

I understand that 'ser' is used to describe permanent states or qualities while 'estar' is used to describe temporary conditions. But, I've seen 'ser' used in situations that seem like conditions. For example, 'ella es feliz.' Could you go over this seemingly grey area? It would be greatly appreciated.

Although the following words may be thought of as conditions, they may take 'ser'

feliz	happy
desgraciado	unhappy
pobre	poor
inocente	innocent
culpable	guilty
consciente	aware
rico	rich

Examples:

Él es un hombre muy pobre.	He is a very poor man.
Ella quiere él sea feliz.	She wants him to be happy.
Soy conciente de mis acciones.	I am aware of my actions.
Nosotros nos sentíamos culpables aunque no lo fueramos.	We felt gulity even though we weren't.
Él es tan rico que podría comprar una mansión.	He is so rich that he could by a mansion.

 

Although life and death may seem like the most permanent conditions that could exist, they must always take 'estar' (estar muerto / vivo).