לזכות ידי"נ הרה"ג ר' איעזר זאב בן דבורה וכל ב"ב
Avaham says to the two lads who accompanied them to the Akeidah ונשתחוה ונשובה אליכם - We will bow down and return to you.
That is odd, given that Yitzchak was not inteneded to return but to be slaughtered and sacrificed. So what does ונשובה אליכם mean?
And what is the meaning of ונשתחוה - We will bow? What were they doing when they bowed?
When they [and we] bowed we display our intention to lower our materialistic, physical side or even our limited qualities, thereby elevating our souls.
Then it says ונשובה אליכם - we will return to you. This means that we will return to influence the world. When a person reaches a certain elevated level [such as when he lowered his body by bowing], his perspective is that it no longer matters where he is when influencing the world. So yes, Yitzchak will not return in body - but his legacy and soul are forever. Both Avraham and Yitzchak will return as Avraham said - just in different forms. Avraham with his body, Yitzchak with his soul.
Read this gem!