Eloquent, persuasive, this superb collection of essays is an impressive plea from the missionary spirit which has carried Christianity into every sphere of activity all over the world. What is the frontier? There are several, the author contends. On the political frontier, it is the Church's duty to sensitize the conscience of a nation, to insure equal rights and privileges for all. The Church is also desperately needed on the cultural frontier where the march of events has shattered a secularistic world view. But the ultimate problems of the Church are on the missionary frontier. Unity is not enough - and he continues, "evangelistic fervor is needed, a passion to make Jesus Christ known and loved, and obeyed among men."