Imagination is the representation of sensations or physical objects in the mind without any immediate input of the senses. Often described as forming pictures in the mind, it is commonly equated with
Joseph Noel Paton , Dante Meditating the Episode of Francesca da Rimini and Paolo Malatesta
Medieval paintings of imaginary creatures, as seen in frescos and manuscripts, often combined body parts of different animals, and even humans.
Don Quixote, engrossed in reading books of chivalry.
An idea is the result of thought. Although the word is used in common usage, in philosophy, ideas can also be mental representational images of some object. Many philosophers have considered ideas to
Plato, one of the first philosophers to discuss ideas in detail. Aristotle claims that many of Plato's views were Pythagorean in origin.
"Modern Book Printing" from the Walk of Ideas