关于自律的英语表达，综合权威资料整理如下：

一、核心定义类

1. Discipline is the bridge between goals and accomplishment.

（自律是目标与成就之间的桥梁）—— Jim Rohn

2. Self-discipline is the most important quality of character.

（自律是性格最重要的品质）

二、行动激励类

1. Where there is a will, there is a way.

（有志者，事竟成）

2. The longest journey begins with the first step.

（千里之行，始于足下）

3. Rome was not built in a day.

（伟业非一日之功）

三、品质描述类

1. He is very disciplined in his studies.

（他学习非常自律）

2. Self-coercion is the key to success.

（自我约束是成功的关键）

3. The ability to control one's desires is true strength.

（控制欲望的能力才是真正的力量）

四、生活哲理类

1. Life is like a single-way ticket with no return.

（人生就像一张单程票，没有彩排）

2. Time is money, and time is lost forever.

（时间就是金钱，一去不复返）

3. The best preparation for tomorrow is doing today.

（明天最好的准备就是今天行动）

这些句子覆盖了自律的定义、行动指南、品质彰显和生活智慧，可根据具体场景灵活选用。