a word for 'a firm conviction about existence following death, pragmatically keeping one from excessive this-worldliness, materialism, etc'

Question

Provided it is clear enough, the title speaks for itself, I guess.To clarify though, I'm after a word or phrase, with positive connotation, that may denote:

• a strong personal ideology or belief, inspiring the believer to think of life and its vicissitudes with reference to afterdeath and humankind's immortality, resulting in their taking worldly matters lightly, tolerate difficulties easily, etc.

It may be a synonym for a word in my native language whose exact translation could be death-mindedness, to my knowledge. Besides, it is not associated with any specific religious inclination, at all.

any suggestions?

Answer 1

You can consider immortalism. In philosophy and religion, it is the belief in soul's immortality rather than biological immortality.

Immortalists believe that at the core of every human is an immortal soul, a spiritual entity, “a transcendental ego,” which has existed forever, will exist forever, and separates from the body at death.

_{[Philosophy of Religion: The Basics by Richard E. Creel]}

Answer 2

I would call it simply faith

i.e. a firm belief in something for which there is no proof, (or no prove is needed.)

edit:

Actually, coming to think of it, faith sounds too religious for the context.

Perhaps some of these are a bit closer;

insouciant
inˈso͞osēənt,ˌaNso͞oˈsyäNt/

adjective

showing a casual lack of concern; indifferent.

centered

(of a person) well balanced and confident (or serene)

happy-go-lucky

adjective

cheerfully unconcerned about the future

unflustered
ənˈfləstərd/

adjective

not agitated; calm and self-controlled.