1. You have to sit down with each other.

2. You have to endure each other.
3. You have to be patient with each other.

(Does #1 mean #2 or #3?)

No, they don't mean the same thing.

And sentences 2 and 3 don't mean exactly the same thing either.

http://www.answers,com/endure
and
http://www.answers.com/patience
("be patient" and "have patience" are approximately the same thing)