Harp of God 39
Eden contained perfect food that would have sustained the perfect man and he would not have died had he remained in Eden, unless Jehovah had put him to death in some direct manner. But God drove him out of Eden, took him away from the perfect food, caused him to gather his food from among the thorns and thistles and from other imperfect elements of the earth that were found outside of Eden; and in this condition he continued to sicken and to die until at the end of the period of 930 years he was dead.
This theme is repeated numerous times throughout the 20s and 30s. As a speculation on my part: it reflected into the WTS admonition against vaccinations, aluminum cookware and, ultimately, laid the "psychological" basis for the blood transfusion ban.