Chasidut para sa Isaias 63:16

This is likewise the explanation of the verse,²³Isaiah 63:16 “You are our father,” that²⁴See tractate Shabbat 89b “this refers to Yitzchak,” that this Tzchok (laughter) will come about in the future.²⁵The word Yitzchak (the name of the second forefather) means, “I will laugh” in the future tense. This refers to the laughter in the time of revelation which follows the tears of the time of concealment during exile. Specifically at that time, we will address Yitzchak as “our father.” That is, it will come out from its opposite, which is the weeping that there was during the time of exile, as known.

Another way of interpreting the peculiarity of the verse ‎citing specifically “the G’d of Yitzchok his father,” addresses the ‎statement of the Talmud on the same folio, when it quotes a ‎verse in Isaiah 63,16 ‎כי אתה אבינו כי אברהם לא ידענו וישראל לא יכירנו ‏אתה ה' אבינו גואלנו מעולם שמך‎, “for You are our Father, for though ‎Avraham did not know us and Israel has not recognized us, You O ‎Lord, are our Father.” The Talmud explains the background to ‎this perplexing verse. It states that in the future, when G’d would ‎say to Avraham: “your children have sinned against Me,” ‎Avraham’s response was “let them atone by having to die for the ‎sanctification of Your name.” The Talmud quotes Yaakov at that ‎time as adopting a similar attitude. Only Yitzchok is quoted as ‎challenging G’d, describing the Jews as the children of Avraham ‎and Yaakov and himself, without at the same time describing ‎them also as His children. When Yaakov presented his offerings ‎at Beer Sheva in honour of the G’d of Yitzchok, he meant to ‎remind G’d of this concern of his father Yitzchok for his children ‎even if at the time they were sinful.‎

This is likewise the case in the verses, “In Your great goodness”²⁸See the liturgy of the Morning prayers. and “If he will redeem you, good”²⁹Ruth 3:13 and “Great goodness for the house of Israel,”³⁰Isaiah 63:16 and the like.