How does Hudson Taylor use imagery in Hudson Taylor's Spiritual Secret?

Imagery:

"His own heart, meanwhile, was entering more deeply into what it means to live and die 'without Christ,' and his outlook was enlarging. From temple-crowned hilltops and the height of ancient pagodas he would look down upon cities, towns and villages where the homes of millions of people were in sight—men, women and children who had never heard the one, the only Name 'whereby we must be saved.'"