What we know today will become useless tomorrow. As we find out more and more stuff, we have to re-visit all that we know and make sure that the truth is always at the center of what we know. For example, in medicine, there was time ulcers were treated with cold water lavage (hose was swallowed to go inside the stomach to flush cold water in and out) and milk was used as well thinking that the protein coagulum (with acid) would coat the ulcer and heal it. Now we know milk has calcium and can actually make it worse. We also know, cold water doesn't do much except wash the acid out temporarily. Another example, we are living in a dark age where we kill ALL multiplying cells with chemotherapy when all we want to do is kill just the breast cancer cells. As a result, hair cells die, skin and mucus cells die and your immune cells (your fighting warrior cells - the white cells die too, making you vulnerable to infections and diseases). There will come a time, that this will be considered barbaric medicine. A time where you will use a bullet instead of an atom bomb , literally speaking!
Hence, as we move forward, we need to unlearn what we know and keep pushing the boundaries of our ignorance. Emptying out what we know makes space for new knowledge to reside and be accepted. Re-evaluation is key to our survival esp. so in medicine.
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