老年人相信一切，中年人怀疑一切，年轻人知道一切。
The old believe everything, the middle-aged suspect everything, the young know everything.
War is an ugly thing， but not the ugliest of things； the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse.
He who knows only his side of the case knows little of that.
There is no perfection only life.