互联网是协作的地方，但它也需要信任。
The Internet is a place for collaboration, but it also requires trust.
The past is a shadow that follows us, always present, always influencing our steps.
The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil, no good, nothing but blind, pitiless indifference.
没有听到不如亲耳听到，亲耳听到不如亲眼见到，亲眼见到不如清楚知道，清楚知道不如亲自实践。
