老年人相信一切，中年人怀疑一切，年轻人知道一切。
The old believe everything, the middle-aged suspect everything, the young know everything.
If knowledge can create problems, it is not through ignorance that we can solve them.
"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart."
The companies that will thrive are those that see conservation as an investment, not a cost.