The general meaning of this passage is that if a person is really excellent, he can do whatever he wants; If a person is an idiot, let him do whatever he wants. Before long, every industry began to complain, but every line was not good at it until it was old. Those who are impetuous and restless always feel that this is not good and that is not good. If you trade this industry for that industry, you will get nothing.
Extended data:
Requirements for couplets:
1, words are equal and sentences are consistent. In addition to deliberately leaving a place for a word to achieve a certain effect, the number of words in the upper and lower couplets must be the same, neither more nor less.
2. Be straightforward and have a harmonious tone. The traditional habit is to "pucker up and fall flat", that is, the end of the last sentence of the first couplet is puckered up and the end of the last sentence of the second couplet is flat.
3. Parts of speech should be relative and in the same position. It is generally called "virtual to virtual, real to real", which means that nouns to nouns, verbs to verbs, adjectives to adjectives, quantifiers to quantifiers, adverbs to adverbs and related words must be in the same position.