Rembrandt had an interest in uncovering condition of the human soul. His religious works did not depict angels and trumpets as other works do like that of Bernini and the like. His mature works, like T"he Return of the Prodigal Son, differs from the religious arts of Italy and Flanders in their inward-turning contemplation.
Answer:
It is important to evoke realism and drama in the Catholic Baroque Art because it creates rich artwork, similar to Renaissance style, but more drama. It was used to power the Counter reformation/revival of Catholic Church.