He shall not go in unto the veil - The priest with a blemish was not permitted to enter into the holy of holies, nor to burn incense, nor to offer the shew-bread, nor to light the golden candlestick, etc. In short, he was not permitted to perform any essential function of the priesthood.
He was not treated as an outcast, but enjoyed his privileges as a son of Aaron, except in regard to active duties.
Leviticus 21:20
A dwarf - One who is small and wasted, either short, as in the text, or slender, as in the margin. It is hardly likely that dwarfishness would be overlooked in this enumeration. So most critical authorities.
Scurry or scabbed - These words most probably include all affected with any skin disease.
Leviticus 21:22
See Leviticus 2:3 note; Leviticus 6:25 note.
Leviticus 21:23
Sanctuaries - The places especially holy, including the most holy place, the holy place, and the altar.
This law is of course to be regarded as one development of the great principle that all which is devoted to the service of God should be as perfect as possible of its kind.