[198] On which account also, he has separated the things which have weight from those which are light, uniting the one class by a closely connecting combination, and bringing forth the other in a disunited form; as where he says, "Take to thyself sweet odours, stacte, onycha," these things being weighty he mentions unconnectedly, being the symbols of earth and water. Afterwards he begins afresh with the other class, which he mentions in combination, saying, "And the sweet spice of galbanum and the transparent frankincense," these again being in their own nature emblems of the light things, air and fire.