Daf 390 (Pesachim 67a-67b)
The gemara seeks to determine which forms of contamination would disqualify an individual from participating in the Pesach offering and which forms of contamination are more serious– those that come from without or those that come from within.
Daf 391 (Pesachim 68a-68b)
“One contaminated with corpse tumah has a more stringent law than one who emitted semen.”
Consideration of the protocol for scraping sheep intestines leads to musings on the resurrection of the dead and a dispute on whether the World to Come will include gentiles.
The gemara reviews all of the holidays, seeking to determine which are for the sake of God and which are for the sake of you.