真正的巨人是那些坚持某些东西的人，他们清楚地知道自己想说什么，并且用力量和清晰度表达出来。
The real giants have been those who have stood for something, who have had a clear idea of what they wanted to say and have said it with force and clarity.
Your most unhappy customers are your greatest source of learning.
The most successful products are often the simplest solutions to everyday problems.