欺骗自己，也欺骗别人。

[deceive oneself as well as others;fool others as well as oneself] 用自己都无法置信的话和手法来欺骗别人,既欺人,又自欺

自己：

1.代词。自身﹐本身。

2.自己人。

3.知己亲近;关系密切。

欺骗：

以虚假的言行掩盖事实真相﹐使人上当。