It is slow because it is possible to learn to feel evil as though it is good (and vice versa) and thus lose the ability to understand good and evil. Here is a story about one experiment which vividly depicts how and why this happens. I borrow this story about the experiment from one internet philosophy forum discussion. The topic for the subject of this experiment was posted by a person named Sanja.
Quotation:
“Close five monkeys in a cage. Set a thin ladder up to the very top and put a banana there. Sooner or later one of the monkeys will go in order to reach the fruit. At this point, take the hose and give an icy water shower to the other four monkeys. When the monkey eats up the banana, put another one again at the top of the cage. Again, when one of them starts to climb up, give a cold water shower to the others. Repeat this ten, if necessary, twenty times. At one point, when one of the monkeys sets forth for the banana, the other four will throw themselves at him and physically try to stop him – to beat him, if necessary – because they do not want to be showered. Once you have achieved this, take one of the monkeys from the cage and bring a new one instead of him. Of course, the new one will instantly go for the banana, and the other four will throw themselves at him and beat him. The new monkey, not understanding what is happening, will try to reach the fruit for another two-three times, but as he will always get beaten he will eventually stop. Then, the time comes to replace another monkey. The other new monkey goes for the banana, but the old three throw at him and beat him.
Now comes the most important moment of the experiment, as together with three old monkeys, which experienced the cold shower, the first new monkey takes part in beating the second new monkey, although he does not know why he is doing this, because he did not experience the cold shower.
By replacing the monkeys constantly, at one moment there will be five absolutely new monkeys, and the newest one will try to reach the banana, but he will be beaten by the other four, new monkeys, who do not know why they are beating him at all (they have never experienced the shower), but they saw that such is the custom.”
The conclusion from this experiment is that for the monkeys the banana that hangs at the top of the cage is by its nature good, and beating is evil, but that was changed in a violent way, by training, so now it has become good to ignore food, and to want the banana and to try to reach it has become evil because there is a custom to be beaten for going after the banana.
The same thing has been happening to the people on Earth for thousands of years. How?
In the conditions of the validity of the principle of division, hatred, rivalry, and struggle, those who prove to be winners in a system start to manipulate the defeated ones (start to train them) by imposing onto them such life solutions, laws and moral norms which mean good for the winners and evil for the defeated. Over time these imposed moral norms become adopted by the defeated – they become a habit, tradition even a sanctity that must not be desecrated or changed. Centuries and millennia can pass and many generations could suffer living by these imposed moral norms, and no one would realize that it is pure masochism, i.e. evil which is understood and maintained as good. In this way through manipulation (training), one of man’s five basic psychological abilities has been destroyed – the ability to understand, which always comes down to the ability to feel and distinguish between good and evil and nothing else. So, in this way, world powers have completely ruined human reason, because without reason people cannot become aware that they are being manipulated. It is no secret, for example, that the world powers blame this very same faculty of reason for all the evils of this world, calling it “devil’s work” and putting it outside of the law, strictly punishing anyone who dares to use it. This is accomplished by “giving masses a cold water shower”, i.e. making people live in fear of punishments – punishments from God, Hell, and bonfire, different forms of physical violence, of being arrested, killed, deprived of possessions, of being expelled, etc – so that people are compelled to believe blindly and without any reproach, without true logical explanation and understanding, that those moral norms that the world powers set as living standard are not evil for people but are beneficial and good. For example, people are taught that it is a great honor, a sanctity, and that it is good to be a faithful servant and slave to your ruler and master, to go into war and give your life for him, for your country, religion, nation, God, etc. Although all this is evil, still for people it has the elevated meaning of good for which false tokens are awarded, for example, different medals and recognitions or “eternal life in Heaven” etc. That is why it is necessary to destroy human reason so that people would accept, in the same way that the monkeys did, things like these so that they would be allowed only to listen to their masters, learn what they are told, and believe that and act according to that without reproach. This is the main reason why false knowledge and explanations in the form of different ideological – political and religious dogmas and traditions still rule the world, and evil with them as well, and why the evolution of human consciousness i.e. reason has been stagnating for thousands of years. This is the main reason why people are still not reasonable beings. Whoever dares to use reason gets mocked by the whole society, and he gets convicted or severely punished. This is the reason why our planet is still only (maybe you have seen the movie) “The Planet of the Apes”. It seems that we will continue to be like this for a long time. Not because it should be or it is good to be like this, not because we do not know or do not deserve better, but because such is “tradition” i.e. “custom”.