Here are 15 pieces of encouraging short sentences in English for a youthful and beautiful life:

1、"The future belongs to those who believe in their dreams and work hard."

2、"Never stop dreaming, and never stop trying to make your dreams come true."

3、"Success is not a destination, but a journey that requires perseverance and courage."

4、"You are stronger than you think, and your dreams are within reach if you believe and work for them."

5、"Keep going no matter what the challenges may be. You are more than capable to overcome them."

6、"Believe in yourself and trust in your abilities, even when the going gets tough."

7、"Set your goals high, and never settle for less than what you deserve."

8、"The road to success is not always smooth, but the view from the top is worth the climb."

9、"Success is not a gift, it's a journey that requires effort and dedication."

10、"You can achieve whatever you want if you set your mind to it."

11、"Be brave, be strong, and always believe in yourself and your dreams."

12、"Dream big dreams and never give up on what you know in your heart is right."

13、"Hard work may not always pay off in money, but it always pays off in confidence and self-respect."

14、"You have the power to change your life, so use it well and make a difference."

15、"Life is a journey of self-discovery and growth. Embrace it with courage and optimism."

These short sentences are filled with hope, inspiration, and encouragement for a youthful life filled with dreams and aspirations.