Exodus 27:20

Verse 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 the following verse.

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.