Blemish
Blemish in the Mosaic law designated physical imperfections or deformities that disqualified men from serving as priests and animals from being offered in sacrifice. The laws of Leviticus 21:17-23 specify that no man of Aaron's offspring who has a blemish—including blindness, lameness, a mutilated face, a limb too long, an injured foot or hand, a hunchback, dwarf, defective eyesight, itching disease, or crushed testicles—may approach to offer God's food offerings. Such men could eat the sacred offerings but could not serve at the altar.
The same principle applied to animals: only unblemished animals—without any physical defect—could be presented as burnt offerings, peace offerings, or vow offerings to the Lord. The requirement for physical perfection was not a statement about the value of disabled persons but a typological principle: the sacrificial system required symbols of wholeness and completeness to represent the perfect offering to a holy God. The New Testament interprets Christ's sacrifice as the fulfillment of this requirement: he is described as a lamb without blemish or spot, whose perfect sacrifice achieves what the repeated blemish-free animal offerings could only foreshadow. Paul applies the same standard to the church, which Christ presents to himself as holy and without blemish.