以下是一些勉勵自己的英文佳句：
1. "Believe in yourself and you can achieve anything."
2. "Success is not final, failure is not fatal: It is the courage to continue that counts."
3. "Life is like a box of chocolates, you never know what you're gonna get." (This is a famous quote from Forrest Gump, which represents the unexpectedness of life and encourages perseverance.)
4. "Failure is not the end of the world. It's just a stepping stone to success."
5. "Grit your teeth and keep going. Everything will be okay in the end."
6. "The best way to predict the future is to create it."
7. "Life is full of ups and downs, but it's how you handle them that defines you."
8. "Your determination and hard work will take you where you want to go."
9. "No pain, no gain. Keep going and you'll reach your goal."
10. "Perseverance pays off. Keep pushing forward and things will get better."
希望這些英文佳句能夠激勵你，幫助你在面對困難和挑戰時保持信心和勇氣。