1.   For no particular reason, he quit the job.

2.   For some unknown reason, Fred quit his job and moved to Alaska.

3.   For some unknown reason, Mark quit his job and moved to Greece.

4.   He quit his job after an argument with a colleague.

5.   He quit his job at Cornell, ending a distinguished academic career.

6.   He quit his job to see the world.

7.   I just want to quit my job and sail the South Pacific.

8.   I wanted to quit my job.

9.   In an unguarded moment, he admitted that he wanted to quit his job.

10.   It took a lot of chutzpah to quit your job like that.