Exodus 27:20

Pure oil olive beaten - That is, such oil as could easily be expressed from the olives after they had been bruised in a mortar; the mother drop, as it is called, which drops out of itself as soon as the olives are a little broken, and which is much purer than that which is obtained after the olives are put under the press.

Columella, who is a legitimate evidence in all such matters, says that the oil which flowed out of the fruit either spontaneously, or with little application of the force of the press, was of a much finer flavour than that which was obtained otherwise. Quoniam longe melioris saporis est, quod minore vi preli, quasi luxurians, defluxerit - Colum., lib. xii., c. 50.

To cause the lamp to burn always - They were to be kept burning through the whole of the night, and some think all the day besides; but there is a difference of sentiment upon this subject. See the note on Exodus 27:21.

This oil and continual flame were not only emblematical of the unction and influences of the Holy Ghost, but also of that pure spirit of devotion which ever animates the hearts and minds of the genuine worshippers of the true God. The temple of Vesta, where a fire was kept perpetually burning, seems to have been formed on the model of the tabernacle; and from this the followers of Zeratusht, commonly called Zoroaster, appear to have derived their doctrine of the perpetual fire, which they still worship as an emblem of the Deity.

Pure oil olive beaten - The oil was to be of the best kind. It is called beaten, because it was obtained by merely bruising the olives in a mortar or mill, without the application of heat. The finest oil is now thus obtained from young fruit freshly gathered. The inferior kind is pressed from unselected fruit under stronger pressure, and with the application of heat.

The lamp - i. e. the lamps of the golden candlestick. (See Exodus 25:37.)

To burn - See the margin "to ascend up." It should be observed that the word does not properly mean to burn in the sense of to consume, but is the word regularly used to express the action of fire upon what was offered to Yahweh (see Leviticus 1:9).

Always - i. e. every night "from evening until morning." Compare Exodus 30:8.

27:20 We read of the candlestick in the 25th chapter; here is order given for the keeping of the lamps constantly burning in it. The pure oil signified the gifts and graces of the Spirit, which are communicated to all believers from Christ the good olive, of whose fulness we receive, Zechariah 4:11 ,12.The priests were to light the lamps, and to tend them; to cause the lamp to burn always, night and day. Thus it is the work of ministers to preach and expound the scriptures, which are as a lamp to enlighten the church. This is to be a statute for ever, that the lamps of the word be lighted as duly as the incense of prayer and praise is offered.