Perhaps these things happen by the will of someone from above.

He just gets the idea, and things happen by themselves.

I have to make it happen by thinking of nothing.

The teaching would happen by itself if she could just get people to experience the real thing.

That happened not far from right here, by the way.

Nothing had happened by the time he reached the trees.

They've worked out a way that it all could have happened by itself.

I mean it could have happened by letter or meeting.

If you happen to have anything like this, by all means use it.

For it wasn't the first time this had happened, by no means.