You can obsess about serving your customers/audience/clients， or you can obsess about beating the competition. Both work， but of the two， obsessing about your customers will take you further.

Success is not final, failure is not fatal: It is the courage to continue that counts.

"I don't write for children. I write for people."

心灵进化是为了应对存在的挑战。

是印度给了我们表达所有数字的巧妙方法，每个符号都有一个位置值和一个绝对值。