I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit.
闹市是赚钱的地方，安静的地方才能休养身体。
沙漠教会你水的价值，沉默教会你言语的价值。
科学不仅是理性的学科，也是浪漫和激情的学科。