Self-reliance, n.
Reliance on one's own powers or judgment; self-trust.
Shades of meaning
Fernald has no entry of its own for self-reliance; he lists it under assurance.
Where he writes about it:
For the calm conviction of one's own rectitude and ability, self-confidence is a better word than assurance; self-reliance expresses confidence in one's own resources, independently of others' aid. — from assurance