People who are precocious are generally late, while those who are proud are more acute. How to understand this sentence?

Hello, "the precocious will be late, and the proud will be sharp." This is the evaluation of Lao Qi Gao Cheng and me. Precocious people will put on the hedgehog's armor too early and hide themselves in a seemingly safe place, dreaming that they will be strong and will not be bullied, but they don't know that they have been isolated and forgotten by the world. Thick armor will make you forget that there are many realistic helplessness and secularity in the outside world, many of which are beyond your control. Living in your own simple world is so simple that you often ignore the original meaning of life. Young and frivolous people want to be understood and recognized by the world, but because they don't know how to compromise with the life world, they are helpless and often ask for trouble.