1. Read more and avoid ignorance.
Even a great orator should draw inspiration from reading.
Don't talk big, just like you said.
The unpretentious language is the expression of sincere heart and beautiful feelings. Therefore, the conciseness of language comes from mutual attitude towards foreign affairs. Words are like people, and every word is heartfelt. Usually people are pure and sincere in the outside world, and their words will naturally not be distorted and artificial.
3. Stay away from lies and big talk.
4. Don't talk empty words and stop platitudes.
5. The choice of objects varies from person to person.
Different people have different understanding of the same thing because of their different external status, so the discretion of speaking depends on their status, identity, education level and language habits.