I couldn't say it better by myself.这句话怎么回事,不懂.啥意思?

I couldn't say it better by myself.这句话怎么回事,不懂.啥意思?
这个演讲的前面讲了感谢三类人，之后内容是：There is a saying from Ireland which is a favourite of mine.Stranges are only friends you haven't met yet.
I couldn't say it better by myself.So from the bottom of my heart,I thank you all and wish you success for the future.其它地方都明白，唯有我问的这句不懂，实在不懂。