There are people who go on lots of first dates because they have a really fixed idea of what they are looking for and simply haven't found it yet. (eharmony.co.uk)
I had some pretty fixed ideas about what were good parenting techniques. (elisabethstitt.com)
I just had this, fatal, fixed idea in my mind that if I didn't share updates daily, then my blog would serve no purpose and would be totally useless. (fashionbarbecue.com)