Trying to do great things?

The writer and academic Debashish Chatterjee once asked Mother Teresa how she had been able to do so many great things in her life:

At first she looked at me quizzically, as if she was trying to figure out what I could possibly mean.  Then she responded by saying simply, "You cannot do great things.  You can only do small things with great love."

From Senge et al., Presence: Exploring profound change in people, organizations, and society, p139.