以下是一些英文励志短句，可以作为宣言或座右铭来激励自己：

1. "Believe in yourself and all that you know. Know that there is something inside you that is greater than any obstacle." - Christian D. Larson

2. "Success is not final, failure is not fatal: It is the courage to continue that counts." - Winston Churchill

3. "The greatest glory in living lies not in never falling, but in rising every time we fall." - Nelson Mandela

4. "I have a dream that one day this nation will rise up and live out the true meaning of its creed: 'We hold these truths to be self-evident, that all men are created equal.'" - Martin Luther King Jr.

5. "The only way to do great work is to love what you do." - Steve Jobs

6. "The best way to predict the future is to create it." - Peter Drucker

7. "Success is walking from failure to failure with no loss of enthusiasm." - Winston Churchill

8. "Don't be afraid to give up the good to go for the great." - John D. Rockefeller

9. "I am a great believer in luck, and I find the harder I work, the more I have of it." - Thomas Jefferson

10. "The only place where success comes before work is in the dictionary." - Vidal Sassoon