I was surprised and annoyed. My boss had just pointed out that he agreed with what I was saying, but that I should have stopped selling him much earlier – that I was wasting his time as well as my own. He suggested that I should learn when to stop talking.
That was good advice, but it hurt. It was hard for a young man, just entering the business world, to accept. Fortunately, the realization dawned later that his criticism was right on target. I would try to avoid ever making that same mistake again.