• to get ideas into one's head
• fantastic, fictional, fictitious, hypothetical, imaginary, mythical, notional, visionary
• fancy, fantasy, imagination
• fantasy, imaginings, phantasm
• lion in the path, lion in the way
• put yourself in my place
• to draw on one's imagination
• bumptious, cocky, conceited, confident, high and mighty, overweening, self-confident, self-important, smarty, snooty, stuck-up, swollen-headed, to think too much of oneself, vainglorious
• cast, conception, fancy, idea, image, notion, theory, visualization