Infinity is intellectually incomprehensible to the human mind. Yet visual and acoustical illusions create the impression of infinite staircases and endlessly rising sequences of tones. Through the conscious use of proportion, the perception of extremes of scale can be induced in the viewer or listener, yet their effect is achieved subconsciously. Likewise a work of art can play with our sense of scale or proportion and influence our perception of time and space. There is a fundamental difference between the common illusion and the visual and acoustic shifts that can occur with our perception of a work of art. With the artwork, the recipient is co-creating aesthetic impressions of repeatable quality and not simply following the effect of an illusion. The article examines the ontological differences between illusions and the pursuit of art that explores the perceptual preconditions of space and time. The aesthetic perspective incorporates two major approaches to its discipline: the reflection of art as well as perception in general.