关于遵守诺言的英文名言警句，综合权威资料整理如下：

一、经典格言类

"A word spoken is an arrow let fly"

一诺千金，言出必行

"A word spoken is past recalling"

说出去的话难以收回

"Keep your word"

信守承诺是赢得信任的基石

二、信用价值类

"Credit is not built to be taken lightly"

信用需经年累月积累，易因一时疏忽丧失

"Credit is the currency of the modern world"

信用与金钱同等重要，是无形资产

"Honesty is the first chapter in the book of success"

诚实是成功的基石

三、行动准则类

"So said, so done"

口头承诺需通过行动兑现

"Keep your promise like defending your honor"

遵守诺言等同于捍卫荣誉

"The only way to do great work is to love what you do"

真诚源于内心热爱，才能始终坚守承诺

这些名言从不同角度阐述了遵守诺言的重要性，既强调信用的稀缺性，也突显了行动与承诺的关联性。建议在人际交往中铭记这些格言，以培养可靠人格。