Later research would clearly reveal that without such empathy, patients did not do so well. (savvysource.com)
If you don't feel that empathy yourself this may be difficult to understand, but fortunately for society a lack of such empathy makes you less likely to reproduce. (religion.blogs.cnn.com)
And without such empathy, kids adapt as best they can but research shows they tend to not thrive. (savvysource.com)