The intensely religious character of the Spaniards led, at an early date, to their consecrating to religion every form of literature; and plays based on the lives of the saints, miracles of the Blessed Virgin, etc., are very common. Almost every prominent doctrine of the church is illustrated in the dramas of Lope de Vega and Calderon. Their plays differ not at all in _form_ from those of a purely secular character; they are all in three acts, in verse. The _autos_, on the other hand, are restricted to the celebration of one doctrine--that of Transubstantiation; consist of but one act (that one, however, nearly equal in length to the three of many secular plays); and were performed on but one solemn occasion--the festival of Corpus Christi. The most striking peculiarity of the _autos_ consists in the introduction of _allegorical_ characters, which, however, were not first brought before the public in _autos_, nor was their use restricted to that class of dramatic compositions. The custom of personifying inanimate objects is as old as the imagination of man, and has been constantly used since the days of Job and David; and Cervantes, in his interesting drama, _Numancia_, introduces “a maiden who represents Spain,” and “the river Douro.” It is not easy to see how the introduction of allegorical personages could have been avoided. The leading idea in all the _autos_ is the redemption of the human soul by the personal sacrifice of the Son of God--that great gift of himself to us embodied in the doctrine of the Real Presence. The plot is the history of the soul from its innocence in Eden to its temptation and fall, and subsequent salvation; the characters are the soul itself, represented by human nature, the Spouse Christ, the tempter, the senses, the various virtues and vices. These constitute but a small minority of the whole number, as will be seen by the following list, which might easily be expanded: God Almighty as Father, King, or Prince, Omnipotence, Wisdom, Divine Love, Grace, Righteousness, Mercy; Christ as the Good Shepherd, Crusader, etc., the Bridegroom--_i.e._, Christ, who woos his bride, the Church--the Virgin, the Devil or Lucifer, Shadow as a symbol of guilt, Sin, Man as Mankind, the Soul, Understanding, Will, Free-will, Care, Zeal, Pride, Envy, Vanity, Thought (generally, from its fickleness, as Clown), Ignorance, Foolishness, Hope, Comfort, the Church, the written and natural Law, Idolatry, Judaism or the Synagogue, the Alcoran or Mahometanism, Heresy, Apostasy, Atheism, the Seven Sacraments, the World, the four quarters of the globe, Nature, Light symbol of Grace, Darkness, Sleep, Dreams, Death, Time, the Seasons and Days, the various divisions of the world, the four elements, the plants (especially the wheat and vine, as furnishing the elements for the Holy Eucharist), the five Senses, the Patriarchs, Prophets, Apostles and their symbols (the eagle of John, etc.), and the Angels and Archangels.