1. Locke: Thinking makes what we read become our own.

2. Planck: The more you think, the more you gain. Thinking can form a bridge that leads us to new knowledge.

3. Kant: There are two things. The more deeply and persistently we think about them, the greater and greater surprise and awe they evoke will fill our hearts. These are The starry sky and the moral law within me.

4. Hugo: Meditation is labor, thinking is action.

5. Klyewski: People who are good at thinking change their thoughts rapidly, while people who are not able to think become dizzy.

6. Einstein: The general ability of independent thinking and independent judgment should always be given top priority.

7. La Rochefoucauld: Spiritual elegance lies in thinking about the good and beautiful things.

8. Thomas: One minute of thinking is worth an hour of nagging.

9. Goethe: What is the most difficult job in the world? Thought. There is nothing worth thinking about that has not been thought about before; all we have to do is try to think about it again.

10. Love and sacrifice: thinking is action.