Most of us like people who speak well. They put a situation in order, they soften a room, and they get things moving faster.
The Analects does not praise that ability. Near the front of its first book it applies a brake, with a line saying that a kind heart is rare in a person whose words run ahead.
Then, in the very next passage, comes a method for looking back at yourself. Which means it did not stop at telling you to be careful with words.