做事情，不能有伤害别人的坏念头；但要有警惕他人、防备他人的念头。这是在告诫与人交往思考不周的人。
The rule of the wild is survival of the fittest.
The past is a mirror that reflects the present.
The books we read in childhood are the ones that shape our souls.
世界不是一个愿望实现的工厂。
Technology can be forestry's greatest ally if we use it wisely.