A thesis statement takes a position, takes a stand on an issue. Merely saying that a topic is important or a problem does not make it a thesis statement. Avoid a thesis which is too broadly stated. Think about what kind of support would be required to prove your statement and the projected length of the paper. Statements about religious beliefs are usually unsuitable for research writing assignments.
Religion is a matter of faith.
Avoid a thesis statement that is a compound sentence or two separate sentences. Your paper should focus on one main position. A thesis that tries to do too much places a heavy burden on the writer. The thesis statement should not be written in the form of a question. Remember, it is a statement of a position, not an inquiry.