Therefore, it can only be expressed in something beyond conscious logic and awareness, the “stealth” of Yaakov to receive the blessing without his father’s conscious awareness. This was also needed in order to correct the Sin of the Tree of Knowledge, that was also caused by deception and trickery, i.e. that of The Snake, who tricked Chava into eating the fruit of the Tree of Knowledge, which caused all of the worlds to become spiritually coarsened and affected that unholiness connected to physicality should mix with spiritual holiness.
To correct this, he (Yitzchok) did just the opposite, by drawing down lofty spiritual Lights to shine even in the physicality of the world, that are so intense that they can refine and separate out the holiness that was mixed into the physicality. This lofty blessing contained Lights that are from higher than the Order of Worlds, that are so high that they can come down even to the lowest physical level and refine it. This refinement of physicality would not have occurred if Yaakov did not receive these blessings; rather, the Torah would only have been drawn down into spiritual levels that exist Above the physical dimension. This spiritual level of the Torah is hinted in the verse “and [Rivka went to the well to draw water, and] her ‘כ ד-jug’ was on her shoulder,” as explained elsewhere.
