It brought a new and strong desire to bear witness for my Master.

It made me more watchful and earnest than ever before, for I knew that any slip in word or deed would bring discredit on my Master." She realized that she had a mission in that school, that she was Christ's witness there, his only witness, and that she dare not fail.
This same sense of responsibility rests upon every thoughtful Christian who is called to be Christ's only witness in a place--in a home, in a community, in a store, or school, or shop, or social circle.

He is Christ's only servant there, and he dare not be unfaithful, else the whole work of Christ in that place may fail.

He is the one light set to shine there for his Master, and if his light be hidden, the darkness will be unrelieved.

So there is special inspiration in this consciousness of being the only one Christ has in a certain place.
There is a sense in which this is true also of every one of us all the time.