土地是我们的母亲，河流是我们的血液。我们必须保护她，因为她是我们的生命。

The improver of natural knowledge absolutely refuses to acknowledge authority as such.  

"We are all completely different people at different points in our lives."

We must be long-termists and not be tempted by short-term interests.

When basic needs are insecure, all idealism withers.