wander off the point

You've wandered off the point, in case you thought I hadn't noticed.'

When I started through the book, this rapid pace and the curious tendency of the author to wander off the point were a bit disconcerting.

But I have wandered off the point and now I can't recall what the point was.

It was not surprising Elwyn was wandering off the point, again, unable to keep his mind in control.

Just when you think that the years may be taking their toll and that he may be wandering off the point, he brings you unerringly back to it.

The white-maned defense lawyer, a man of quiet, professorial demeanor with a tendency to forget names and wander off the point, said David Harris fell victim to the "frailty of humanity" and made "some bad choices."