我们想要创造一种让人心甘情愿被其影响的技术。我们想要创造出美好的、体贴的服务和技术，它们一定要足够实用，实用到人们每天使用它们两次。就像他们使用牙刷一样。并没有多特别，就是人们每天要使用两次。
We want to build technology that everybody loves using, and that affects everyone. We want to create beautiful, intuitive services and technologies that are so incredibly useful that people use them twice a day. Like they use a toothbrush. There aren’t that many things people use twice a day.
解析：告诫人们要珍惜所得。
翻译：既了解敌人，又了解自己，每次作战都不会有危险。