Religion is seen by some as an illustration of this form of deep-seated conditioning. They argue that religious teachings restrict a person's true nature, as natural instincts are said to be sinful. From a young age children learn to associate certain natural impulses with sin. As the child grows older, their behaviour becomes fixed, opposed to what is natural. Whether religion acts as a form of conditioning or not, however, is highly debatable, as can be seen in this ongoing debate.