静默时就能思考，说话时就能教导人，有符合道义的行为就能成就事业，如果这三者交替运用，就能成为圣人。

At a restaurant do you order what you know is great， or do you try something new？ Do you make what you know will sell or try something new？ Do you keep dating new folks or try to commit to someone you already met？ The optimal balance for exploring new things vs exploiting them once found is: 1/3. Spend 1/3 of your time on exploring and 2/3 time on deepening. It is harder to devote time to exploring as you age because it seems unproductive， but aim for 1/3.

Innovation is not imagination out of thin air, but based on a deep understanding of user needs.

化学是一门研究物质性质及其变化的科学。