The Torah, (Leviticus),”VaYikra,” 1:5: He shall slay the young bull before the Lord; and Aaron’s sons the priests shall offer up the blood and sprinkle the blood around on the altar that is at the doorway of the tent of meeting.
Blood is the force of life, the innermost part of the egoistic desire. So before eating the sacrifice, all the blood must be drawn from it, it is forbidden to eat it in any form (as strange as it may seem, this is actually what we are accused of).
The four corners of the altar are the four egoistic phases: the root phase, phase one, two, and three, which are the four phases of a person’s nature, corresponding to the still, vegetative, animate, and speaking levels of nature. So the innermost egoistic desire that the blood symbolizes has to drawn from them.
Sprinkling the blood on the four corners of the altar means that a person pulls out all his desires and sprinkles them on the outside. Thus he confirms that the part that has been cut off from his egoistic desire, the altar, is actually altruistic and is aimed at love and concern for others.
In the spiritual world, the Surrounding Light works against the external vessels (the desires), which we cannot correct. So only the inner attributes are called the altar.
This refers to the correction of the desire that can be used for altruistic work. It isn’t about anything else in the Torah because our correction is only to gradually transform our selfish desires into desires that benefit others for the sake of the Creator.
From KabTV’s “Secrets of the Eternal Book” 11/13/13