I was reading The Gift of Fear the other day and the writer says you should never trust people who randomly say “I promise”, because that’s what you say when you need to convince someone and why would they need to convince you, unprompted? Because they know they’re lying and want to make sure you buy it
Anyway I think the same thing applies to people who just randomly say “im honest, im an honest person”. You wouldn’t feel the need to convince people of that if you were actually honest.