One of them is based on the halacha that an animal has to be inspected for mumim before being offered as a korban. Our being a korban has many echoes in chazal.
Rabbi Rosner, a musmach of RIETS, was a popular maggid shiur in YU’s Stone Beis Medrash Program and Rabbi of Congregation Bais Ephraim Yitzchok in Woodmere, NY before making aliyah in 2008.