Blood represents the form of the Upper Light that we cannot receive because it exists in our biggest egoistic desire that will be corrected only in the final correction.
Only approaching the end of the 6,000-year period (6,000 degrees beginning from Adam) can we correct this desire. Moreover, we just prepare this desire and it will be corrected not by us, but by the Upper Light that comes from above and corrects it.
This action is called “Rav poalim mekabtziel.” This is the coming of the Messiah, the Upper Light. Then the lowest, heaviest egoistic layer is corrected and filled with the Light that is called blood.
Therefore, the most important thing, when using meat, is to free it from blood. All the rituals associated with blood, with a test for blood, with blood output, etc. are based on the fact that this is a natural life for our egoism and we can correct it only at the very last stage.
In addition, such concepts as pure or impure blood also revolve around this: how we can and how we cannot use it, how to be purified from blood and at the same time use it in the correct form, in order to develop. After all, if blood is the basis for life, it is impossible to exist without it.
Blood rises from the uterus to the breasts of the breastfeeding woman, turns into milk that is ready for feeding a baby; that is, it turns from red (the quality of reception) to white (the quality of bestowal).
From KabTV’s “Secrets of the Eternal Book” 6/30/16