It is first important to know what a thesis is. A thesis is the main argument of your essay. As such, a thesis must be debatable, which means that there will be differences of opinion. Therefore, the thrust of the rest of your paper will seek to convince readers that your thesis is correct.
Based on this, if you topic is on dreams, then you will need to have a main point about dreams. Narrow down your topic. Let me give you a few suggestions.
First, some people argue that dreams are the way we live out our unconscious desires and wishes. Debatable, right? That is what makes it a thesis.
Another interpretation is that dreams are a way that we consolidate and process all the information that we encounter in a day. Again, this is debatable, which is why it is a good thesis.
Still another interpretation states that dreams are a way to connect with the divine. This is a more spiritual understanding of dreams. In the end, all of these points are opinions, which need to be defended.
Just to support what has been suggested to you, you may wish to read some on the famous psychoanalyst Sigmund Freud and his theories on dreams and what they reveal about a person. (This would give you some supporting facts for your own thoughts)
As previously stated, knowing what a thesis is would be the first step to writing one on dreams! A thesis is the statement which informs readers what your writing will be about. It is the main idea of your essay and contains broad ideas, while the body of the essay develops different aspects that support your main idea.
First, read a variety of thesis statements on a broad range of topics. This would help you gain a better understanding of exactly what a thesis is.
Next, I would suggest to do some research and take notes regarding the different viewpoints of dreams. Once you have recorded some information, look over the different notes and group them into categories. This will help you focus on the details that will support your thesis. It would not be good to write a thesis and then have nothing to support it! You don't need only professional opinions about dreams, although some are good, talk to your friends, parents and teachers and get their thoughts about dreams as well.
Once you have grouped your notes look for a common idea that many of the notes can fit into. Then write a few different phrases. I find it easier to write and come up with ideas when I don't have a format, at least at first. Getting your ideas onto paper is the important part, the format will easily come later.
A thesis describes the main idea or ideas in an essay. Dreams is a very general term so you need to try and narrow your topic to one or two aspects of dreams that you want to write about. Always read the specific assignment requirements to discover the purpose and audience for the assignment. First, try brainstorming everything that you know about dreams. Second, read through your list and pick one or two topics. Third, research the topics that were interesting. For example, what do dreams mean? Also, by researching topics, you can learn more about dreams and pick a topic with detailed information. Finally, write a general sentence about the topic you chose that limits the topic, but it provides opportunity to expand, argue, inform, or persuade your topic. For example, Different characters in our dreams have meaning related to our daily feelings, stresses, and life events.