Can you ask an expert to explain: water and fire are incompatible?

Fire and water are not good, the heart belongs to fire and the kidney belongs to water. Fire and water restrict and interact with each other to maintain the dynamic balance of physiology, which is called "combining fire and water". Insufficient kidney water can't help heart fire; Or because of heart fire, kidney yin injury, this loss of coordination, upset, insomnia, nocturnal emission and other symptoms, is this kind of lesion. See the article "Heart-kidney disjunction".