perception, the base of life

https://www.youtube.com/watch?v=OAeHtUs8Xi0&list=TL2ZyIRZtK5t0wNzEwMjAxNg

https://www.youtube.com/watch?annotation_id=annotation_407523919&feature=iv&src_vid=OAeHtUs8Xi0&v=tH5IZ3eYG5Q