The germ of an idea began to penetrate my mind.

The word took a moment to penetrate her frantically scrambling mind.

As I reached it, something for the first time penetrated my mind.

Daniel stared at Connor as though he were trying to penetrate his mind.

It seemed to penetrate his mind in a curious way.

But how deeply have we penetrated the viewpoint character's mind?

The voice suddenly changed and the new rasp in it penetrated my mind.

Despite my concern, his offer penetrated my mind as a potential opportunity.

"Can you penetrate my mind at will and read my thoughts?"

Which meant - it was the first time the thought really penetrated my mind - that the Bible might be wrong.