Ohev Yisrael

"Yitzchak entreated Hashem opposite his wife, etc." It is known that when some trouble or suffering comes upon a person, may it not happen, he should reflect and understand in his mind that there is surely great anguish for the holy Shechinah, so to speak, for "in all their affliction He is afflicted," so to speak. Therefore, when an upright person sets his heart to pray to G-d, may He be blessed, about some matter, the main kavanah (intention) and desire of his prayer must be that the lack that this causes in the Shechinah be filled, so to speak. This is in the manner of "I am lighter than My head," etc. When the flaw and lack there are repaired, his own lack is then repaired as well, automatically, and he is redeemed from his trouble.

Yitzchak, peace be upon him, did just this, for his entire aim, desire and kavanah were only to fill the lack in the holy Shechinah, so to speak. This is the meaning of "Yitzchak entreated Hashem, opposite his wife": that is, for the sake of the Shechinah, who is opposite his wife, for it is precisely she who is barren. And then Rivkah his wife was also automatically remembered. Understand this.