When thinking deeply, the first thing is to think in light of your own situation.

When reading, don't stop at exclamations such as "This is the meaning, it is so", but should ask yourself in light of your own situation, "What does this mean to me?" "What would I do if it were me?"
For example, in the work "The Little Prince", I think it is impossible to achieve the purpose of deep thinking by reading and understanding alone.
What would it mean to me if I could think about a rose that was thrown on the planet by the little prince? Think about what kind of existence the fox is for yourself? So it goes into deep thinking.
A rose bloomed on the little prince's planet. The little prince took great care of the rose and took good care of it.
Later, Rose's attitude and words and deeds became capricious, and the little prince decided in desperation to leave his planet and begin a cosmic journey.
After passing through the different styles of "Great King" and "Industrialist Star", he came to Earth.
When he saw the thousands of roses on the earth, he realized that the roses that he thought were unique were actually just an ordinary one of thousands of roses, so he felt very sad.
At this time, a fox came, and the little prince invited the fox to play with him in order to distract himself, but the fox refused on the grounds that "I can't call you a friendly relationship, so I can't play with you yet."
And what the fox means by "friendliness" refers to deepening bonds, unusual relationships. Through his dialogue with the fox, the little prince realized that the rose was unique in the world.
At the time of separation from the fox, the fox says that "turning your rose into an irreplaceable existence is the time you pour into it" and reveals a little secret, "Important things are invisible with the eyes".
"Reading" is to read the main idea that the author wants to express in his work.
Adults are usually busy chasing power, fame, and money, but they neglect the really important "parent-child bond".
By discovering this value that is invisible to the naked eye, life can be enriched. The author should have wanted to reveal such information.
Under the premise of understanding the author's writing intentions, we should further consider our own situation.
To me, the fox in the story is like the one who once told me unforgettable words. At that time, I was not at all careful, and I seemed very mean and cold.
But he was willing to spend time on me, constantly stimulating me through some conventions and other means, and it may be this relationship that has allowed us to establish this bond.
By combining your own thinking, you can achieve a depth that you can't achieve just by understanding the synopsis of the story.
If there is a scene that surprises you while reading, it must be that something in the book unexpectedly matches your own personal experience.
If you continue to read on blindly at this time, you will forget where you have been surprised and why you have been surprised.
Therefore, it is recommended that you develop the habit of taking notes.
It can be annotated directly on the book or written on a notebook. In this way, you can trace your thoughts back to the time with your notes, so that you can continue to think deeply in the future.