The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
科学的发展既需要个人的努力,也需要社会的支持。
真相是,我不知道自己为何写作。我只知道我必须写。
世界不是它看起来的样子;它是我们相信的样子。
By the help of microscopes, there is nothing so small as to escape our inquiry; hence there is a new visible world discovered to the understanding.
任务必须是困难的,因为只有困难才能激发高尚的心灵。