I'm also reminded of the biblical passage: "Ask and it will be given to you; seek and you will find. For everyone who asks receives; he who seeks finds." I'm not particularly religious but that line has always stuck with me.
I think that might be less, "If I ask for a car I'll get a car", and more "If I tune my senses towards whatever it is I want (a promotion, a new job, to be a better parent), then subconsciously my brain might start working to better see those opportunities where they exist." I've seen firsthand in my career that people who were open to opportunities advanced much farther than I did because I closed myself to all of them, waving them away, acting cynical about the whole endeavor. I wish I hadn't done that. I just wasn't seeing what my coworkers were seeing.
I'll stop myself before I keep rambling.