The deepest.

''最灿烂的未来将永远建立在被遗忘的过去的基础上，
你无法生活得很好，
除非你能够忘记过去的失败和心痛。''

I saw this somewhere else.
Everyone understands this but how many of us practice this?
Never forget, but make it part of your nutrients.
wocuoguodetaiduole.