Submit everything or only the best?

Rejection seldom takes a writer well, but taking it on the chin can be enlightening. Personally, I would like to see all of my articles etc. published. But this is unrealistic. One, my article may be inappropriate for the readers although on its own merits stands. Two, not everything of mine should be published. Why? Simply because some of my pieces may be better than the others. So, when something is rejected, it’s not as good as the other pieces.