These colors cast such light both far and near that when men behold them it greatly comforts their sight. The castle, within, is ever blanched as white as any driven snow. Four fair streams flow out of a well in the middle of the highest tower and fill the ditches. So fair and so good is the water, that he who drinks of it has great bliss. A throne of ivory there was set in this tower, and seven steps lead upward, with great worship and honor. Never was a throne half so fair seen in this world; nor did prince or queen ever have so beautiful a one. It was made subtilely, by wondrous design, and a rainbow steadfastly arched above it. The King's Son made it for His own seat; never was there one so fair, nor shall there ever be. This castle of solace and of succor is the blessed body of her who bore our Saviour, and is a refuge for all mankind. Whosoever flees thither shall find succor. The rock, white and fair and stable, is her heart in all its holiness, that made her serve God without fear, in sovereign purity of meekness and maidenhood. The green color, by the ground, that will last so well, is the truth of our lady, aye steadfast. The central color in the midst of this castle wall is enduring hope to attain the grace that saves mankind. The red color above, burning to the sight, is the burning love of God and man, that gives great light. No wonder if this castle is wholly white within, for the heart of that maiden was never defiled with sin. The four towers, great and strong, so fair to see, were ghostly strength and soberness, righteousness and skill.[44] These four virtues drive out all manner of wickedness, and keep fast, within, all goodness.