History of Islamic Medicine 5

The earth is the lowest-ranking body in the universe.
Warmness, coldness, wetness and dryness are the basic components of the universe. Warmness and coldness are the primary natures while wetness and dryness are dubbed as secondary natures.
Adding up these natures will create features for bodies and elements.
1.Warmness and dryness
2.Warmness and wetness
3.Coldness and wetness
4.Coldness and dryness
In a first-ever encounter, man viewed things as purely physical. Later, after mulling them over he came up with the following classification.
1.The solid represented by soil
2.The liquid represented by water
3.The gas or steam represented by air
4.The force represented by fire and light
The more we move from "the force" towards “the solid”, the less warmth we will have. Condensity will increase, as we move in that direction. In other words, the solid and soil are the lowest while light and fire are the highest in nature.
Comparing the above features one would arrive at the following conclusions.
1.Fire and light are warm and dry.
2.Air is warm and wet.
3.Water is cold and wet.
4.Soil is cold and dry.