It is a wonderful thing for people to give up the measure of their own appearance for God’s cleansing. David Guzik
This was a laver to hold water for the priests to wash in when they went in to minister.
This signified the provision that is made in the gospel of Christ for the cleansing of our souls from the moral pollution of sin by the merit and grace of Christ, that we may be fit to serve the holy God in holy duties.
These mirrors were used for the making of the laver. Either they were artfully joined together, or else molten down and cast anew but it is probable that the laver was so brightly burnished that the sides of it still served for mirrors, that the priests, when they came to wash, might there see their faces, and so discover the spots, to wash them clean.
Note, In the washing of repentance, there is need of the looking-glass of self-examination. The word of God is a glass, in which we may see our own faces (see James 1:23) and with it we must compare our own hearts and lives, that, finding out our blemishes, we may wash with particular sorrow, and application of the blood of Christ to our souls.
Usually the more particular we are in the confession of sin the more comfort we have in the sense of the pardon.