I believe that if you'll just stand up and go, life will open up for you.

Sustainability is not just a trend, it's a responsibility.

The arithmetic of L-functions is a journey into the hidden patterns of the universe.

The act of painting is a way of thinking, a way of understanding the world.

出自北齐·颜之推《颜氏家训·文章》。书写文章要尊崇“三易”的原则，即文章内容要清晰明了，这是第一项。书写的文字要简单概要，这是第二项。书写的段落要读起来朗朗上口这是第三项。