Musar su Genesi 27:2

If Isaac is usually referred to as יצחק בן אברהם, this means that Abraham, who represented the attribute of חסד, was the natural forerunner of Isaac, who achieved the status of being worthy of the מדת הדין, attribute of Justice. The power of the son in this case proves to be greater than the power of the father, seeing that the attribute of Justice is the highest form of the attribute of Mercy. G–d, so to speak, rises from the throne called Justice and sits on the throne called Mercy. At that time the name יצחק, which is synonymous with Justice, will be revealed as the source of joy, the deeper meaning of that name spelled as ישחק, as in Psalms 105,9 for instance. The Zohar sees in the letters of Isaac's name when spelled ק"ץ ח"י, a hint of the attribute of Justice, since judgment ends in death, i.e. Ketz Chay. In the future his name will symbolize joy as in Psalms 105. We have repeatedly explained how Abraham was the real reason Heaven and Earth were created as hinted in the spelling of the word בהבראם in Genesis 2,4. Isaac, however, was the spiritual equivalent of Adam before his sin, since he was the first person who was both conceived and born by parents who had sanctified themselves. The removal of Abraham's foreskin repaired the damage Adam had done by sinning and acquiring a קליפה, husk (symbol of sin). Our sages expressed this by saying that אדם הראשון משוך בערלתו, Adam pulled, i.e. disguised, the fact that he had no foreskin, as distinct from Isaac, sanctified (from birth), who became the equivalent of first man who had been formed by G–d from holy soil. This may well account for the fact that he was not allowed to leave the holy soil of ארץ ישראל (Genesis 27,2).