Why do people's thoughts become more and more solidified with age?

Everyone is born with a blank sheet of paper, and then experiences a brush.

When people are young or young, there are still many blank places on that paper, they can accept new things and believe what they see in the process of learning.

Moreover, when I get older, the drawing paper is gradually filled up, and there is no place to scribble, and I have no ability and ideas to accept new things.

As they grow older, they don't want to accept new things, feel that their life experience is complete enough, and they don't want to learn anything: they are willing to admit that they made mistakes.

This is called stubbornness. They stubbornly believe that everything they think is right is truth. At this time, you will find it extremely difficult to get them to accept new things.

For example, the problem of smart phones, you will find that as young people, we will play well with mobile phones even if we don't study, but they will find it difficult.

It is normal for old people to solidify their minds. We should follow them and avoid conflicts with them.