Elijah's arrival led later composers to try to copy Mendelssohn's success with Biblical oratorios of their own, but their attempts stand out mostly as examples of the simpering excesses of Victorian slush. The saccharine efforts lacked the skill, power, and conviction of Elijah, and now languish in well-deserved obscurity. But Elijah holds the listener's ear with its music and its meaning.
Elijah tells the story of the stern prophet who called the misbehaving people of Israel to repentance, and who clung to his resolve through a world of troubles until he was carried by a whirlwind into heaven as a reward. The subject enabled Mendelssohn to write a work that combined his ancestral Judaism with his own Lutheranism and to attempt to build a bridge from the Old Covenant to the New. You can explore how Mendelssohn achieved his inspiring goal in this complete orchestral score from Dover. The usual caveats for Dover's reprints of out-of-copyright editions prevail: the scores are not the most up-to-date, they usually lack English translations, and, because they're full scores, you will not be able to plunk them down on the music stand in front of the average organist and expect her to play it with any ease. That said, the scores are a tremendous bargain for anyone--students, professional musicians, amateur music lovers--with the urge to study a complete score of a fascinating work.