Collage can be a metaphor for consciousness. After all, the mind is like a collage. Ephemera, glued together by an invisible Artist. The result in patterns may or might not make sense.
Some minds might be like a collage by the painter Elliott Puckette.
Others might be like a work by Raven Schlossberg:
Still others might resemble the minds of Thomas Hirschhorn and Felipe Oliveira Baptista: you never know what they’ll look like.