What idioms are there to show that a person is very knowledgeable?

A very knowledgeable idiom is as follows:

Speak in language? Talented people are knowledgeable and enjoy it?

Study tirelessly? Excellent, world-famous, knowledgeable and backward?

Pass the exam with honors

The characteristics of idioms are as follows:

Idioms are special fixed phrases, which are used together, and most of them are derived and refined from ancient Chinese. Therefore, mastering more idioms is of great benefit to learning ancient Chinese. In ancient Chinese, the flexible use of parts of speech is quite common, and these characteristics are still retained in idioms.

The idiom story of talented people is as follows:

Xie Lingyun, a state-owned writer in Southern Song Dynasty, was a famous landscape poet in ancient China. His poems mostly describe the scenic spots in Guangxi, Yongjia and Lushan, and are good at depicting natural scenery, creating a school of landscape poems in the history of literature. His poems are very artistic, paying special attention to formal beauty, and are very popular among scholars. As soon as this poem came out, people scrambled to copy it and it was widely circulated. Song Wendi appreciated his literary talent and specially recalled him to Kyoto, calling his poems and calligraphy "two treasures", and often asked him to write poems and compositions while serving banquets. Xie Lingyun, who has always been pretentious, is even more arrogant after receiving this courtesy. On one occasion, while drinking, he boasted: "Since the Wei and Jin Dynasties, there was only one stone in the world (one unit of capacity, one stone equals ten buckets), of which Cao Zijian (that is, Cao Zhi) monopolized eight buckets, and I shared one bucket with others in the world." As can be seen from his words, except for Cao Zhi, the talents of others are not in his eyes, and his self-evaluation is very high.