There is no definitive answer to this question, as Mother Teresa's views on the matter were never made public. However, based on her actions and words throughout her lifetime, it seems likely that she did believe in some form of higher power. For example, she regularly prayed and attended religious services, spoke about the importance of faith in interviews, and once said I know God will not give me anything I can't handle. I just wish that He didn't trust me so much. Given all of this evidence, it seems safe to say that Mother Teresa did indeed believe in God.