"Writing is a way of thinking, not just a record of thought."

User needs are both the starting point and the ultimate goal of product development.

"The most beautiful people we have known are those who have known defeat, known suffering, known struggle, known loss, and have found their way out of the depths."

你的水无法流动是因为我。

Probability theory is nothing but common sense reduced to calculation.

You can't use up creativity. The more you use, the more you have.

愉快是健康的最佳促进者。