St. Teresa ran away from her father's home to become a Carmelite nun at age 17. Although he did not approve of her taking orders, he acknowledged her determination and granted his consent. After recovering from an illness, she began seeing holy visions. Because she considered the rules of her convent too lax, she founded a reformed (the only time reformed has ever been used to mean more strict) convent. Over the objections of local religious authorities, she founded several sister-houses of her new, more strict convent.
Like many saints, she sounds like she was threatening, or at least irritating, to local authorities. She was canonized within forty years of her death, and four centuries later, was proclaimed a Doctor of the Church, but you have to wonder if the Carmelites ever regretted letting her in. When I read that she had played "hermit"as a child in her father's garden, I had to think that they all should have seen it coming.