I wonder if there's a way to change how one thinks, to not assume that the other person won't trust what one says, and so avoid getting nervous / acting like a

I wonder if there's a way to change how one thinks, to not assume that the other person won't trust what one says, and so avoid getting nervous / acting like a culprit I wonder if thinking "I get paid anyway the same each month, what does it matter if they believe me or not" helps (unless one might get fired)