害人之心不可有， 防人之心不可无。

One should never intend to do harm to others， but should always guard against the harm others might do to him.

相信上帝，但是别忘了锁门；（防人之心不可无）

Trust God, but don't forget to lock the door;

当讨论这件事，我们不可有歪门邪道的念头。

Let's get our minds out of the gutter while discussing this matter.

不可有傲气，摒傲气完善人品；不可无傲骨，以傲骨支撑人格。

Cannot not have the lofty character, by lofty character support personality.

对打回合赛的主审和副审或与参赛者不可有相同国籍。

The Referee and Judges of a kumite bout must not have the nationality of either of the participants.