The proverb in "Fire Must Be Hollow" is that eggplants don't bloom false flowers, and real people don't tell lies.

The complete sentence is: Eggplants should not bloom empty flowers, real people should not tell lies; fire should be hollow, and people should be loyal; do more good deeds, and do no evil; do not be afraid of people making mistakes, but be afraid of not correcting them; A straight tree has many uses, and a straight person has many friends; if you are determined, things will come true; your words must be true, and your deeds must bear fruit; if it is sunny and foggy for a long time, it will be cloudy; if it rains and fog is long and foggy, it will clear; with an open mind, all things can be accomplished; if you are complacent, everything will come to nothing.

How can you get the fragrance of plum blossoms without being chilled to the bone? If a knife is not sharpened, it will rust, and if a person does not learn, he will fall behind. Diseases enter from the mouth, and misfortune comes from the mouth. Walking day by day, don’t be afraid of millions of people. Here, do it often and don’t be afraid of thousands of things.

Characteristics of proverbs:

Ready-made words commonly used in people's lives. Proverbs are similar to idioms, but they are more colloquial and easy to understand. They generally express a complete meaning and are almost always one or two short sentences in form.

The contents of proverbs include a wide range of things. Some are agricultural proverbs, such as "before and after the Qingming Festival, plant melons and beans." Common sense proverbs in various fields, such as "Humility makes people progress, pride makes people fall behind", "A hundred steps after a meal, and you will live to be ninety-nine", etc., are of many types and are countless.

Proverbs, like idioms, are part of the Chinese language as a whole and can increase the vividness and vividness of the language. But proverbs and famous quotes are different. Proverbs are the practical life experience of working people, while famous quotes are what celebrities say.