For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.
Success is not about how much money you make, it’s about the difference you make in people’s lives.
希望是让我们继续前进的东西，即使道路黑暗。
The only thing that makes life possible is permanent, intolerable uncertainty; not knowing what comes next.