Resilience isn’t; pushing through, taking control or carrying on regardless of how you feel, but is about developing strategies that help you manage when facing situations you find stressful.
But we all respond to stressful situations differently. You may be someone who can carry on without a second thought, or perhaps you're someone who finds quite minor difficulties overwhelming. Having an ability to respond well to, and learn from, stressful situations is what we think of as resilience.
So, a good way to think of resilience is; your ability to cope with, or recover from, stressful and even traumatic experiences.