Commentaries
27:20,21 The pure oil signified the gifts and graces of the Spirit, which all believers receive from Christ, the good Olive, and without which our light cannot shine before men. The priests were to light the lamps, and tend them. It is the work of ministers, by preaching and expounding the Scriptures, which are as a lamp, to enlighten the church, God's tabernacle upon earth. Blessed be God, this light is not now confined to the Jewish tabernacle, but is a light to lighten the gentiles, and for salvation unto the ends of the earth.
21. shall order it from evening to morning—The tabernacle having no windows, the lamps required to be lighted during the day. Josephus says that in his time only three were lighted; but his were degenerate times, and there is no Scripture authority for this limitation. But although the priests were obliged from necessity to light them by day, they might have let them go out at night had it not been for this express ordinance.