Technology in forestry has evolved from chainsaws to satellites, but our responsibility remains the same.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.  
What we fear doing most is usually what we most need to do.
我在大学的时候,一直想参与做能够改变世界的事情。而现在我就在做这样的事情。
The world is the totality of facts, not of things.