If you have access to private information that is about you that somebody else wrote and it is negative information, are you allowed to open it and get access to it?

The limits of shlichut- You can't have someone perform a mitzvah of the "body" (tefillin, tzitzit, sukkah) on your behalf- how shofar is an exception to this rule

Why it is better to perform a mitzvah on one's own than have a shaliach/messenger do it on one's behalf.

How to understand the concept of half-liable/half-meritorious where one good or bad deed will tip the scale. What were the Rabbis trying to teach us here and how does this impact the days of Rosh Hashana and Yom Kippur?

Could Moshe have possibly lived longer than 120 years?