In the Conversations of Rav Nahman [of Breslov] is brought a long tired against doctors. But Rav Aryee Kaplan pointed out that this was written when even oxygen was unknown. Medicine was medieval, It was all about balancing the four elements. However the same warning of Rav Nahman still applies today There procedures that are time tested and well known. These are okay. But new experimental things are not. My parents warned me not to take any medicine that has not been on the market for at least 50 years.
Medicine is still all about "balancing the four elements" except they use a different terminology in order to hide what they are doing: i.e., correcting chemical imbalances
