The blue color reflects the sky, democracy, uprightness, cleanness, innocence, peace, reliability, sincerity, and nationality. The park has been extolled for its relative calmness and cleanness. It improves the molten metal fluidity, and enhances cleanness of the surface. It emphasizes cleanness, readability, and objectivity. The term "Sunda" also means bright, light, purity, cleanness and white. There are several classes of "chaberim", corresponding to the several degrees of Levitical cleanness. The lowest class pledges itself to practise Levitical cleanness of ""k'nafayim"" (literally "wings"). Both strove for a certain cleanness, when not poverty, in their edifices. The result is a quasi-modern cleanness, lacking embellishments. Historically, the Fonteyn Kill's water has been noted for its cleanness. "Cleanness" (which is an editorial title) is also known by the editorial title "Purity". His second novel, "Cleanness," was published in January 2020 and well received by critics. A didactic, homiletic poem, "Cleanness" consists of 1812 lines.