Leviticus 21:6 emphasizes the holiness required of priests, which is symbolized by the holy crown on Aaron's head in Exodus 28:36-38, signifying the bearing of iniquity and the need for holiness.
Leviticus 21:8 calls the priests holy, set apart for God, which parallels 1 Peter 2:9 where believers are described as a royal priesthood, emphasizing the call to holiness for all God's people.
Leviticus 21:10 describes the high priest's unique role and holiness, which is fulfilled in Jesus as the perfect high priest in Hebrews 7:26-28, who is holy, blameless, and exalted above the heavens.
Leviticus 21:17-23 outlines physical requirements for priests, highlighting the need for perfection, which contrasts with Hebrews 4:14-16 where Jesus, the perfect high priest, sympathizes with human weaknesses.
Leviticus 21:21 excludes those with physical defects from priestly service, while Isaiah 53:2-3 describes the Messiah as having no beauty or majesty, yet He fulfills the ultimate priestly role.