Esther - Sarah link; the itzumo shel yom of Purim

1) See my wife's blog for a nice take on the relationship between Esther and Sarah.

2) There is a machlokes Rebbi and Chachamim whether עיצומו שׁל יום is mechapeir on Yom Kippurim or whether teshuvah is required as well.  R' Yaakov Moshe Charlap held that the machlokes is only viz a viz Yom Ki-Purim, but on Purim itself, everyone agrees that עיצומו שׁל יום is mechapeir.  

R' Yisrael Salanter is reported to have said that a wise person can accomplish as much in ruchniyus in his seudas Purim as an unintelligent person accomplishes with his tefilas ne'ila. 

Take advantage of the day!