Love is the only thing that makes life bearable, but it is also the source of our greatest pain.
爱是唯一让生活可以忍受的东西,但它也是我们最大痛苦的来源。
"الحب هو أن تعطي دون أن تنتظر أي شيء في المقابل."
The key to progress in science is persistence and an open mind.