世界充满了美与丑，而我们选择看哪一种。
The world is full of beauty and ugliness, and it's up to us to choose which one we want to see.
Children totally accept — and crave — family rules. “In our family we have a rule for X” is the only excuse a parent needs for setting a family policy. In fact， “I have a rule for X” is the only excuse you need for your own personal policies.
The most innovative solution is often the one nature already provided.
The only limits in life are the ones you make.
One never reaches home, but wherever friendly paths intersect the whole world looks like home for a time.
科学不仅仅是事实的集合；它是一种思考方式。