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In the Old Testament God commanded that a lamp filled with the purest oil of olives should always burn in the Tabernacle of the Testimony without the veil (Exodus 27:20, 21). The Church prescribes that at least one lamp should continually burn before the tabernacle (Rit. Rom. iv, 6), not only as an ornament of the altar, but for the purpose of worship. It is also a mark of honour. It is to remind the faithful of the presence of Christ, and is a profession of their love and affection. Mystically it signifies Christ, for by this material light He is represented who is the "true light which enlighteneth every man" (John 1:9). If the resources of the church permit, it is the rule of the Caerem. Episc. (1, xii. 17) that more than one light should burn before the altar of the Blessed Sacrament, but always in uneven numbers, i.e. three, five, seven, or more. The lamp is usually suspended before the tabernacle by means of a chain or rope, and it should hang sufficiently high and removed from the altar-steps to cause no inconvenience to those who are engaged in the sanctuary. It may also be suspended from, or placed in a bracket at the side of the altar, provided always it be in front of the altar within the sanctuary proper (Cong. Sac. Rit., 2 June, 1883). The altar-lamp may be made of any kind of metal, and of any shape or form. According to the opinion of reputable theologians, it would be a serious neglect, involving grave sin, to leave the altar of the Blessed Sacrament without this light for any protracted length of time, such as a day or several nights (St. Lig., VI, 248). For symbolical reasons olive oil is prescribed for the lamp burning before the altar of the Blessed Sacrament, for it is a symbol of purity, peace, and godliness. Since pure olive oil, without any admixture, causes some inconvenience in the average American climate, oil containing between 60 and 65 per cent of pure olive oil is supposed to be legitimate material. Where olive oil cannot be had, it is allowed, at the discretion of the ordinary, to use other, and as far as possible vegetable, oils (Cong. Sac. Rit., 9 July, 1864). In case of necessity, that is, in very poor churches, or where it is practically impossible to procure olive or vegetable oils, the ordinary, according to the general opinion of theologians, would be justified to authorize the use of petroleum. We are of the opinion, however, that there are but few parishes that can claim this exemption on the plea of poverty. Gas (Ephem. Lit., IX, 176, 1895) and electric lights (Cong. Sac. Rit., 4 June, 1895) are not allowed in its stead. The Caerem. Episc. (ibid.) would have three lights burn continually before the high altar, and one light before the other altars, at least during Mass and Vespers. Before the Blessed Sacrament, wherever kept, a lamp should be constantly burning. Our bishops have the power of granting permission to a priest, under certain circumstances, to keep the Blessed Sacrament in his house. In such cases, by virtue of Faculty, n. 24, Form. I, the priest may keep it without a light, if otherwise it would be exposed to the danger of irreverence or sacrilege. For the same reason we believe It may be kept also in the church without a light during the night.
APA citation. (1907). Altar Lamp. In The Catholic Encyclopedia. New York: Robert Appleton Company. http://www.newadvent.org/cathen/01354b.htm
MLA citation. "Altar Lamp." The Catholic Encyclopedia. Vol. 1. New York: Robert Appleton Company, 1907. <http://www.newadvent.org/cathen/01354b.htm>.
Transcription. This article was transcribed for New Advent by Michael C. Tinkler.
Ecclesiastical approbation. Nihil Obstat. March 1, 1907. Remy Lafort, S.T.D., Censor. Imprimatur. +John Cardinal Farley, Archbishop of New York.
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