In the primary identified description of Bosch's artworks, in 1560 Felipe de Guevara wrote that Bosch was regarded simply as “the originator of monsters and chimeras”.
In the beginning 17-th century, the Dutch Karel van Mander explained Bosch's art as “marvelous and extraordinary fantasies”; nevertheless, he finished that the paintings are “frequently less enjoyable than frightening to look at.”
In the 20-th century, researchers have come to sight Bosch's vision as fewer unbelievable, and acknowledged that his art reflects the conventional religious faith systems of his time. His images of sinning people, his view of Heaven and Hell are now perceived as consistent with those of late medieval didactic literature and habits.
Nerveless, some critics notice Bosch as example of medieval surrealist, and parallels are repeatedly made with the modern Spanish artist Salvador Dali. Other scholars try to interpret his images using the words of Freudian psychology.