He made him sick and prevented him from seeking what he wanted. The name silver came to him, so it was only one degree lower than gold, and perfection is in four. This fell short of perfection by one degree from four, and four is the first complete number. This is why it includes ten, so silver was a quarter of a tenth, due to it being one degree lower than gold due to the predominance of coldness. Cold is an origin and a higher one, and heat is an origin and a higher one, and humidity and dryness are two passive branches, so moisture follows coldness because it is passive from it, and for this reason silver was formed over half the time of the formation of gold .