In 1 Enoch, the watchers (angels from heaven) made wives of some women on Earth and taught them medicine, incantations, and the usage of roots and plants. Although God did not approve of these actions, He actually punishes them for it; it still shows that angels have knowledge for healing diseases that they can pass on to people on Earth. It also shows that people are able to comprehend this knowledge, since it is not mentioned that the women struggled or were too overwhelmed by what they learned (1 Enoch 7:1-2).