and another thing
Meaning
and another thing
(colloquial) Used to introduce a new topic of conversation; by the way.
Examples
Let me tell you one thing. There is great complexity in this creation. The Master does one thing through one man and another thing through another person. Oh, it is so inscrutable!
It's one thing thinking something and another thing knowing it.
And another thing is that I think as a church whenever we become politically driven, we alienate at least 50 percent of the people that God called us to reach with our political orientations.
That was putting the case in a nutshell. But it is one thing to put a case like Shelley's in a nutshell and another thing to keep it there.
It is one thing to get educated and another thing to keep educated.