Great post- thank you for sharing. The concept of resiliency is something we're learning about in my classes. I like the idea that there can be certain contextual/environmental protective factors that promote resiliency; if fostered, these factors can permit the survival of and recovery from traumatic experiences.
I tend to agree with her (Maya Angelou) though, based on my (limited) knowledge of the subject. The general consensus is that resiliency is an internal mechanism by which we "bounce back" from trauma. However, resiliency can be expanded upon by various outside forces, and can help promote a sense of self-efficacy in us, by which our self-esteem should begin to build.
This is a brief summary and maybe a gross over-simplification. But I don't want to bore you with an essay!