בראשית, פרק מ״ח, פסוק י׳

The transfer of blessings to a new generation is a profound moment where physical frailty meets spiritual endurance. As a patriarch prepares to bless his grandchildren, failing senses necessitate new, deeply tangible ways to convey love and channel divine grace.

The primary approach among commentators is that Jacob's failing vision is a natural consequence of aging, where the eyes become clouded and can only perceive shadows or the contrast between light and dark [ביאור שטיינזלץ]. This physical reality explains a prior moment of confusion where Jacob could see the silhouettes of Joseph's sons but could not clearly identify them [ריב״א, פענח רזא, בכור שור, רלב״ג]. Unlike his father Isaac, whose blindness was the central cause for a swapped blessing, Jacob's diminished sight is noted simply as a natural result of his advanced years, serving primarily to explain his need to ask who the boys were [שד״ל, ברכת אשר על התורה]. His vision had deteriorated to the point where even the visual aids available in the ancient world would have been entirely useless [פרדס יוסף].

Beyond the physical decline, some commentators view this blindness through a spiritual lens. One perspective suggests his eyes grew heavy from the prophetic vision of wicked kings destined to descend from the tribe of Ephraim [הדר זקנים]. Conversely, another approach posits that Jacob's intense immersion in divine inspiration and spiritual realms naturally caused his physical eyes to shut out the material world [חתם סופר]. Taking this spiritual interpretation further, one view entirely rejects the idea of a physical defect. Because Jacob was granted a taste of the World to Come and suffered no physical ailments, his heavy eyes are understood conceptually as the maturity of profound wisdom and a life immersed in Torah study [תורה תמימה].

To bridge this sensory gap, Joseph brought his sons close to his father. This action was primarily practical, allowing Jacob to perceive them as clearly as possible [רלב״ג]. However, the positioning held deeper implications. Some suggest Joseph intentionally arranged them outside the customary order of right and left [רד״ק]. He anticipated that his father's poor eyesight might lead to an accidental swapping of hands, placing the right hand on the younger Ephraim, echoing the way Isaac's blindness once led to a redirected blessing [קיצור בעל הטורים, פענח רזא, ביאור יש״ר]. Another tradition notes that Joseph was actually bringing them near for a second time. He had previously pulled them away, fearing his father might curse them upon foreseeing their wicked descendants. Now, he brought them back so Jacob could focus on the righteous progeny destined to emerge and bless them accordingly [שפתי כהן].

With his vision compromised, Jacob relied on physical touch to transmit his blessing. Usually, a blessing requires the blesser to look favorably upon the recipient. Unable to make eye contact, Jacob utilized embraces and kisses to bind his soul to theirs, ensuring the blessing would firmly take hold [ספורנו, תולדות יצחק, צאינה וראינה]. This tactile affection served as an emotional substitute, allowing him to express deep love through touch when sight was no longer an option [העמק דבר]. Because of his blindness, his movements were not perfectly precise, and he could only direct his kisses and embraces generally toward them [אור החיים]. Furthermore, this intimate contact was essential to awaken a sense of joy within Jacob. Just as Isaac had embraced and kissed Jacob before blessing him, this joy was necessary to invite the Divine Presence, which only rests upon a person in a state of happiness [הטור הארוך, הדר זקנים]. Ultimately, despite his inability to clearly see, Jacob's experience culminates in a profound expression of gratitude to God for the extraordinary kindness of allowing him to witness his offspring [ברכת אשר על התורה].