They are not monuments, but footprints. A monument only says, 'At least I got this far,' while a footprint says, 'This is where I was when I moved again.'

Time is a concept that is derived from the way we perceive change.

心理活动总是朝向某个目的。

最好的肥料是农民在田地上的身影。

恨与爱都是感知。

创新是进步的关键。