Комментарий к Берешит 29:11

ויבך AND HE WEPT- because he foresaw by the Holy Spirit that she would not be buried with him in the cave of Machpelah (Genesis Rabbah 70:12). Another explanation is: he wept because he came with empty hands. He thought: Eliezer, my grandfather’s servant, had with him rings, bracelets and all good things, whilst I have nothing with me (Genesis Rabbah 70:12). This was because Eliphaz Esau’s son pursued Jacob by his father’s order to kill him, and overtook him. But because Eliphaz had been brought up on Isaac’s lap, (cp. Deuteronomy Rabbah 2:13) he withheld his hand. He said to him (Jacob), “But what shall I do as regards my father’s order?” Jacob replied, “Take all I have and you can say that I am dead for a poor man may be accounted as dead" (Nedarim 64b).

And cried in a loud voice. He was pained that he did not merit marrying her in his youth so that by now he would have had grown up children.

וישק, since she had realised that Yaakov had done all this on her account, she accepted his kiss. Furthermore, he had told them כי אחי אביה הוא, i.e. a son of her father’s sister, a son of Rivkah, who was known to all the people of Charan to have become married to Yitzchok.

וישק יעקב לרחל, “Yaakov kissed Rachel, etc. The reason the Torah referred to Rachel as קטנה, “small,” is that she was still a minor and Yaakov could not consummate marriage vows with her. This was the reason Lavan was not worried to hand his flocks to her instead of to his already adult daughter Leah who was liable to be molested by the male shepherds on account of her age. We should also note that Yaakov did not kiss Rachel on the mouth but on the head or the shoulder, suggesting that there was no sexual element in that kiss (Ibn Ezra).

Because he foresaw... she would not be buried with him. There is a question on this explanation: If she would ask him, “Why are you crying?” he surely would not mention her death to her. What would he answer? Therefore Rashi brings another explanation. And with the second explanation alone, a question arises: Why would this great tzaddik cry because he came empty-handed? (Maharshal)

ויבך, he wept for joy. When close relatives meet after not having seen each other for a while, their emotional cup runs over so that they find it hard to control their feelings and they give way to them by crying for joy.