我们都有自己的时间机器。带我们回去的叫回忆，带我们前行的叫梦想。
"We all have our time machines. Some take us back, they're called memories. Some take us forward, they're called dreams."
"The principles of a free society are essential for human progress and prosperity."
The most exciting breakthroughs in AI are yet to come.
"The only real failure in life is not to be true to the best one knows."
