Let's Say

Be careful what you say,
Best not to say too much,
I'm not saying not to say anything,
But, say nothing as such.

Let's just say if you have something to say,
Something important, say,
How you say it cannot be taken back,
And will prob'ly come back to you one day,

Say, what if you said things in your head first?
Then see what you say back,
A genus of saying experiment,
Test if what you say lacks.

Or let's just say,
You say sayings only,
It is like you didn't say anything,
So many people've said those already.