The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
Seek ye the priesthood also
The "gainsaying of Korah" was intrusion into the priest's office ("no man taketh this honour unto himself,") (Heb 5:4). It was an attempt to create a priestly order without the divine authority (Heb 5:10). The modern analogue is Nicolaitanism (Rev 2:6); (Rev 2:15) the division of an equal brotherhood (Mat 23:8) into "clergy" and "laity"; a vastly different thing from the due recognition of ministry-gifts; (Co1 12:4-31); (Eph 4:8); (Eph 4:11); (Eph 4:12) or of elders and deacons; (Ti1 3:1-13); (Tit 1:5-9).
atonement
(See Scofield) - (Exo 29:33)