Wiktionary
n. (context idiomatic English) integrity of character; resoluteness of will; mental resistance to doubt or discouragement.
Usage examples of "inner strength".
Our boys will take heart having seen you display such inner strength.
With all his inner strength he resolved to be wise and not believe, but in his heart he knew he had seen her picture and that he would do anything, risk anything to see her.
It was up to the spirits now, and the inner strength of the child.
I need another month, though, to nurse back my inner strength before I can go to the Palace and look for the other seven.
Lying on the noisome floor of the cage, Nicholas could see through slitted eyes four guards armed with AK-47s, and he began to calculate the odds, work out the vectors, while he summoned the inner strength he would need from ko-koro, the heart of Tau-tau.
It was, in effect, a haven, the source of Nicholas's inner strength and resolve.
She felt his inner strength as if it were a palpable caress on her arm and, always having wanted such a core of power within herself, prized her proximity to it now.
We are speaking not so much of pure physical strength now, Lieutenant, but of an inner strength.
Even with her pale eyes, her face was too severe to be beautiful, but this austerity lent her a kind of inner strength even in repose.
One of the primary lessons of all martial arts required the student to find that deep well of reserves of inner strength that resided in everyone just below the navel.