What are the motifs in Heat and Dust by Ruth Prawer Jhabvala?

Materialism is a motif in the story. Most of the young people in Satipur have a pinched look that, the narrator thinks, comes from worrying about their ability to sustain their lives. Additionally, both Inder Lal and the doctor at the Satipur hospital long for modern materials slightly beyond their grasp. The narrator though has fled the materialism of the west—and the novel concludes with her contemplating seeking asylum in an ashram further up the mountain. Chid, in contrast, is content to traverse India with his begging bowl (he can phone home for more money when he needs it). The Nawab, however, was a genuine Indian "prince"—a title respected by the British colonial government insofar as what his ancestors had done to get it was outside their jurisdiction: the Nawab had only enough money to indulge a few of his many material tastes.