I disapprove of what you say， but I will defend to the death your right to say it.
我不同意你说的话，但我愿意为你说话的权利而献出生命。
You can't change the past, but you can ruin the present by worrying about the future.
In the vast expanse of the universe, the answers we seek are often hidden in the most unexpected places.
真相很少是纯粹的，也从不简单。