What makes Mother Teresa's acts of charity very exemplary?

Question

What makes Mother Teresa's acts of charity very exemplary?

Answer 1

She sacrificed her own way of life for the good of others.  Sought no payment or recognition beyond the approval of GOD

Answer 2

That she began without an organization, just helping where she could. That she drew others to join her without soliciting them. That she spent hours in prayer to strengthen herself for ministry with the dying--which is very draining. That she took so little for herself materially even as her work became better known and better funded.