What does this quote mean? “In 1907, William James speculated, "We are making use of only a small part of our possible mental resources ... men the world over possess amounts of resource, which only...

What does this quote mean? “In 1907, William James speculated, "We are making use of only a small part of our possible mental resources ... men the world over possess amounts of resource, which only exceptional individuals push to their extremes of use" (James, 1907, p. 322-323). James advocated that psychologists direct their efforts at two main questions: First, what is the full range of human abilities? Second, through what diverse means are these abilities unleashed”