Here am I... send me

How then can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them? Romans 10:14-15

Then I heard the voice of the Lord saying, Whom shall I send? And who will go for us? And I said, Here am I, send me!    -Isaiah 6:8

-Kate
Southeast Asia