What are the wisest quotes you've ever heard or read?

         Here are some timeless and wise quotes from various sources:

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

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

3. "Knowing yourself is the beginning of all wisdom." - Aristotle

4. "In the end, it's not the years in your life that count. It's the life in your years." - Abraham Lincoln

5. "The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle." - Steve Jobs

6. "Life is what happens when you're busy making other plans." - John Lennon

7. "Happiness is not something ready-made. It comes from your own actions." - Dalai Lama

8. "We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Will Durant (often attributed to Aristotle)

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

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

11. "The only way to make sense out of change is to plunge into it, move with it, and join the dance." - Alan Watts

12. "A journey of a thousand miles begins with a single step." - Lao Tzu

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

14. "It does not matter how slowly you go as long as you do not stop." - Confucius

15. "If you want to go fast, go alone. If you want to go far, go together." - African Proverb

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

17. "The mind is everything. What you think you become." - Buddha

18. "It's not what happens to you, but how you react to it that matters." - Epictetus

19. "Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment." - Buddha

20. "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light." - Plato

These quotes offer wisdom on various aspects of life, encouraging reflection and growth.