Every mental state corresponds to a specific brain state.
数学中最重要的是理解概念，而不仅仅是记忆公式。
You are too generous to trifle with me. If your feelings are still what they were last April, tell me so at once. My affections and wishes are unchanged, but one word from you will silence me on this subject forever.
The most important thing is to enjoy your life—to be happy—it's all that matters.
Success comes from solving real problems, not just chasing trends.
虽然说是爱它，其实是害它；虽然说是为它担忧，其实是与它为敌