外游者，求备于物；内观者，取足于身。摘自
解释：向外物游览就要要求外物的完备，向自己内心求取，则能充实完善自身。
The only limit to your impact is your imagination and commitment.
It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
The dead are not absent. They are just invisible.