以下是關於努力的英文格言：
1. Constant effort, but never give up.
2. The longest journey begins with a single step.
3. Success is not final, failure is not fatal: it is the courage to continue that counts.
4. Nothing great was ever achieved without hard effort.
5. The best preparation for tomorrow is to live today.
6. There is no substitute for hard work.
7. Achievement takes hard work and perseverance.
8. The secret of success is constancy of effort and the habit of putting forth 100 per cent effort when there is a need for result.
這些格言都強調了努力的重要性，認為只有不斷的努力才能取得成功。