If that is the case, this community of thought ought to find expression in words and conversation.

Nothing of the sort.

It was extremely difficult for us to talk with each other.
What a toil of Sisyphus was our conversation! Scarcely had we thought of something to say, and said it, when we had to resume our silence and try to discover new subjects.

Literally, we did not know what to say to each other.

All that we could think of concerning the life that was before us and our home was said.
"And then what?
If we had been animals, we should have known that we had not to talk.