Humans are composed of both body and soul.  It is the Church's mission to care for both, since body and soul are indissolubly united.  We will be judged only on whether we love God and love our brothers and sisters.  Since God cannot be enriched, or improved, or harmed by anything we do to Him, the chief way we show our love for God is by loving His children.  That's it.  That's all.