Single-word-request for 'freedom from self'
Solution 1:
(Self-)transcendence maybe?
transcendence: a state of being or existence above and beyond the limits of the material world
Solution 2:
I think enlightenment is close to what you are referring to :
- (Buddhism & Hinduism) A state in which the individual transcends desire and suffering and attains nirvana.
(AHD)