45、"It always seems impossible until it is done." - Nelson Mandela

46、"Your time is limited, don't waste it living someone else's life." - Steve Jobs

47、"In the end, we will remember not the words of our enemies, but the silence of our friends." - Martin Luther King Jr.

48、"Do what you can, with what you have, where you are." - Theodore Roosevelt

49、"The best time to plant a tree was 20 years ago. The second best time is now." - Chinese Proverb

50、"It is never too late to be what you might have been." - George Eliot

51、"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful." - Albert Schweitzer

52、"You are never too old to set another goal or to dream a new dream." - C.S. Lewis

53、"The only person you are destined to become is the person you decide to be." - Ralph Waldo Emerson

54、"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart." - Helen Keller

55、"The only thing we have to fear is fear itself." - Franklin D. Roosevelt

56、"Life is not measured by the number of breaths we take, but by the moments that take our breath away." - Maya Angelou

57、"The journey of a thousand miles begins with one step." - Lao Tzu

58、"Believe you can and you're halfway there." - Theodore Roosevelt

59、"The only limit to our realization of tomorrow will be our doubts of today." - Franklin D. Roosevelt

60、"It always seems impossible until it is done." - Nelson Mandela

61、"What lies behind us and what lies before us are tiny matters compared to what lies within us." - Ralph Waldo Emerson

62、"Be the change that you wish to see in the world." - Mahatma Gandhi

63、"The future belongs to those who believe in the beauty of their dreams." - Eleanor Roosevelt

64、"The only true wisdom is in knowing you know nothing." - Socrates

65、"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful." - Albert Schweitzer

66、"You are never too old to set another goal or to dream a new dream." - C.S. Lewis

67、"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart." - Helen Keller