We don't need to claim that recycling our soda bottles is going to save the world for our children's children.
(That may be true, in fact, but it's better to claim too little than too much; otherwise, our readers are going to be left with that feeling of "Who's he/she kidding?
Writing, just as much as reading, is a process of self discovery.
Do not, in any case, simply restate your thesis statement in your final paragraph, as that would be redundant.
If you wish to make a new point, it should be in a body paragraph. (For strategies on rewording, the principles of paraphrasing can help.) Often the thesis statement is revisited near the beginning of the conclusion.
As in the introduction, it is essential to revisit your thesis statement in the conclusion. The rest of the conclusion expands out, giving the reader an idea of the relevance and implications of your answer: As with the introduction, this order of elements is not set in stone.
*The list of things that you might do in a concluding paragraph is taken from the University of Richmond's online document, Writing Conclusions (with the gracious permission of UR's Writer's Web coordinator, Joe Essid).
No new information that is relevant to the focus of the essay should be introduced here.
The last thing we want in our conclusion is an excuse for our readers' minds wandering off into some new field.
Allowing a peer editor or friend to reread our essay before we hand it in is one way to check this impulse before it ruins our good intentions and hard work.