Trying to find who delivered a speech I heard

I'm hoping that, as a chronicler of the spoken word, you can help me identify a speech I head only a brief segment of on NPR a number of months ago. I don't recall who the speaker was or what the event was at which the speech was delivered except that I think it was a political function (inauguration, perhaps) and part of me thinks that it may have been delivered by a South African figure (Mbeki or Mandela?), but I'm not sure about this. The 60 seconds or so that I heard was very inspiring and I'm hoping to identify it so that I can find it, either recorded or a transcript.

The gist of the sample that I heard was something along the lines of ...

God doesn't want us to be shy and retiring. God is never happier than when we dream large dreams and live to make them real.

Live a larger-than-life life

Those aren't the specific words, rather just the tone of the piece. I think it was fairly recent (within the last few years). I recognize that this is a scant clue, but I'm hoping that it might hit on a recollection of yours which helps me to identify the piece.

Thank you in advance,

Regards,

Tobias Gilk

With the South African clue I think that it my be called God has a dream by Archbishop Desmond Tutu

God has a dream is a personal and liberating message of hope and light in dark times. In it, Desmond Tutu shows how important it is that even as we face the harsh realities of our individual lives and global conditions, that we remember the importance of hope and dreams.

http://godhasadream.com/