Time for a big change in thinking by all of us.

I knew what he was thinking by the look on his face.

I think by the end of the day you're going to feel much better.

I want to think things over a while, by myself.

He hadn't thought of himself by that name in more than two years.

I don't think by any means it was a last chance.

If you begin thinking along these lines, by all means take a week off.

"With the way things are going, I think by the end of the day those numbers could be a lot higher."

You can think about that, all by yourself in your room.

"Is that who you were thinking about down by the lake?"