The most important property of a program is whether it accomplishes the intention of its user.

The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.

The harder you work, the luckier you get.

过去永远不会消逝，它甚至从未过去。

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.

Collaboration across borders and industries is the key to solving global challenges.

Collaboration across industries is essential to solving the complex challenges of energy production.