In the novel's conclusion, how does Philippa respond to her final test in the book, In This House of Brede?

Philippa's final test comes when Dame Colette the nun chosen to be prioress at the Japanese monastery dies suddenly. It is obvious Philippa is next in line for the position but again she falters. It takes a pep talk from Dame Agnes to make Philippa realize she must give all of herself to God. This includes going where He wishes and doing His wishes. Philippa accepts the position as prioress and in the end of the book waves good bye to her friends as she boards the plane to Japan.