My dad's a scratch golfer and I've got the knack of seeing something and then replicating it. I saw my dad swing a club and I worked out how to do the same thing. My backswing and follow-through have been basically the same since I was two.
The ever quickening advances of science made possible by the success of the Human Genome Project will also soon let us see the essences of mental disease. Only after we understand them at the genetic level can we rationally seek out appropriate therapies for such illnesses as schizophrenia and bipolar disease.