asceticism

nouns

the doctrine that through renunciation of worldly pleasures it is possible to achieve a high spiritual or intellectual state
asceticism
is a type of (narrower)
a belief (or system of beliefs) accepted as authoritative by some group or school
doctrine, ism, philosophical system, philosophy, school of thought
the trait of great self-denial (especially refraining from worldly pleasures)
asceticism, austerity, nonindulgence
rigorous self-denial and active self-restraint
ascesis, asceticism