Although R' Frand did not deliver his live shiur this evening due to a family wedding, R' Frand did post a pre-recorded Parsha vort on OU Torah which I have summarized here. This week's vort can be found at https://outorah.org/p/226333 and I have attempted to reproduce the vort to the best of my ability in this post. Any perceived inconsistency is the result of my efforts to transcribe the shiur and should not be attributed to the maggid shiur.
R' Frand began the vort by noting that in this parsha the Torah states that the Levi'im begin their service at age 25. However in Parshas Bamidbar it states that service begins at 30. R' Frand quoted Rashi who asks - is it 25 or 30? Rashi answers that there are 5 years of training which begin at 25, but he can't begin the Avodah until 30.
R' Frand noted that the Kohanim did the lion's share of the work in the Beis HaMikdash, but there is no pasuk that teaches that they have a 5 year training period, even though the role of the Levi is less arduous.
R' Frand quoted R' Berel Weinberger in Shemen HaTov who explains that the Levi'im have only 20 years to work - from 30-50, unlike the Kohanim who don't have an end date. As the Levi'im only have 20 years, they can't afford to learn on the job, they train ahead of their "go" date.
R' Frand observed that when boys come to Yeshiva they think that the learning will last forever, but they don't realize that the time in Yeshiva is finite. Very few people stay in Yeshiva, learning forever. R' Frand said that he tells his students that they should hit the ground running as it will not last forever.
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