The past is not a prison but a springboard.
If you want to understand a system, try changing it.
【译文】 孔子说:“有益的朋友有三种,有害的朋友有三种。与正直的人交朋友、与诚实的人交朋友、与见多识广的人交朋友,有益处;与走邪门歪道的人交朋友、与谗媚奉迎的人交朋友、与花言巧语的人交朋友,有害处。”
It is wrong to have an ideal view of the world. That's where the mischief starts. That's where everything starts unravelling.