过去从未死去，甚至还未过去。
"The past is never dead. It's not even past."
The future of agriculture lies in sustainable practices that balance productivity with environmental stewardship.
Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!
We use mathematics to understand the markets, not to predict them.