SPIRITUAL truths cannot be grasped, unless the following UNIVERSALS be known: I. Everything in the universe, in order to be anything, has relation to good and truth, and their conjunction; and, consequently, to love and faith, and their conjunction. II. With man there is will and understanding and the will is the receptacle of good, and the understanding the receptacle of truth, and everything with him has relation to these two things and their conjunction, even as everything relates to good and truth and their conjunction. III. There is an internal and in external man, and they are distinct from each other like heaven and the world, and yet they ought to make one, that man may be truly man. IV. There is a light of heaven in which the internal man is, and a light of the world in which the external man is; and the light of heaven is the very Divine Truth, from which comes all intelligence. V. There is a correspondence between the things which are in the internal man and those which are in the external man; and thus they appear on either side under a different form, so that, they cannot be discerned except by the science of correspondences. Unless these and many other things are known, only incongruous ideas can be received and formed concerning spiritual and celestial things; wherefore, apart from the above universals, the scientifics and knowledges belonging to the external man, can be only of small assistance to the rational man for all increase of his understanding. From this it appears how necessary scientifics are. Much has been said in the Heavenly Arcana concerning these universals.