Now concealment is evinced in the reference of the seven circuits around the temple, which are made mention of among the Hebrews; and the equipment on the robe, indicating by the various symbols, which had reference to visible objects, the agreement which from heaven reaches down to earth. And the covering and the veil were variegated with blue, and purple, and scarlet, and linen. And so it was suggested that the nature of the elements contained the revelation of God. For purple is from water, linen from the earth; blue, being dark, is like the air, as scarlet is like fire.