“言而无信的人”和“强者没有必要去笼络弱者”英语怎么翻译？

言而无信的人是Speech but faithless person
强者没有必要去笼络弱者是The strong has no necessity to halter a weak

A person of no credibility
A strong man has no need to flatter the weak

言而无信的人: the one who always break one's word
强者没有必要去笼络弱者: It makes nonsense for a strong coming round a weak.