What are the sentences in The Analects that Confucian disciples told themselves to keep introspection?

Confucius said, "If you don't do it, you will be introspective."

Confucius said, "If you have a threesome, you must learn from me. If you are good, follow it, if you are not, change it. "

Confucius said, "I visit three times a day, and I am unfaithful to others. I don't believe in making friends and I'm not used to it. "

Confucius said, "an upright man is open and poised, I am worried."

Confucius said, "You are not born with knowledge, but you are eager for it in ancient times."