But if someone eats the meat for his own pleasure so the light of 'nogah' in it is included in the 2nd level of 'the other side' which is totally bad. Though, since it's not forbidden to eat, he could lift it back to be holy trough returning back to doing G-d's will. Therefore, the translation of the word 'permitted' in Hebrew is 'mutar' which also means 'untied', since whatever is permitted, if one ate it for pleasure and it fell to the bad, it's not tied to the bad rather one could return it to be good. But still a trace of the bad stays in his body since it became a part of him, and therefore the worms consume the body after ones passing. But if one eats something which is forbidden to be eaten, even though he ate it so he should be able to pray and learn Torah, it could never be included in holiness since it's forbidden. Therefore the translation of the word 'forbidden' in Hebrew is 'asur' which also means 'tied', because it's tied to the bad and cannot be disconnected from it. Only if he returns to G-d to do his will from the depth of his heart, till his bad deeds are considered good, trough love towards G-d from the depth of his heart, when he feels how far away he is from G-d, he awakens a thirst to stick to G-d. And the farther he is, the bigger the thirst. And through this true love and thirst to G-d he will return back to listen to G-d and do his will. And that is why our sages said that even the most righteous person cannot be on the level of someone who stopped sinning and returned back to G-d, because a righteous person never sinned and cannot understand the thirst to G-d, because the thirst is a lack of something, and the righteous person was never lacking love to G-d and never sinned, therefore he cannot have a this thirst to stick to G-d. But if he does not return trough this love, G-d will forgive him, but the sin will not be considered a good deed.