The most important thing about a theory is that it should be testable.
关于理论最重要的事情是它应该是可测试的。
我为自己是黑人感到非常自豪，但黑人并不是我的全部。那是我的文化历史背景，我的基因构成，但它不是我全部的身份，也不是我回答每个问题的基础。
"The past is a foreign country; they do things differently there."
The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.
"The only way to discover the limits of the possible is to go beyond them into the impossible."