Musar for Numbers 8:2

אל מול פני המנורה יאירו שבעת הנרות . We read in Proverbs 20,27, נר ה' נשמת אדם, that "the soul of man is the light of G–d." One needs to see to it constantly that one's soul is lit up through the study of Torah and the performance of מצות. The body of man is somewhat like the shape of the candelabrum. The Menorah had three protrusions on its stem, the arms that extended from its center. It also had a small elevation as its platform. In a similar fashion man's feet, arms and ears are three protrusions. The torso containing the heart is similar to the stem of the Menorah. Its height of 18 handbreadths is equal to the average height of a fully grown person, as stated in Tosaphot in the Talmud Shabbat 92a.

When the twelve princes offered a sacrifice each on the first twelve days after the Tabernacle was erected, they may have intended to counteract the first twelve years of our lives during which we accumulated sins due to the predominance of the evil urge within us. The thirteenth day, on which the Candelabra was first kindled by Aaron (as we read in פרשת בהעלותך after completion of the offerings by the princes), may symbolise the entry of the good urge within us, i.e. from that time onwards the holy flame of spirituality burns within us constantly. The seven lights on the Candelabra symbolise the seven days of the Passover holiday.

Nachmanides pursues the subject at length and provides answers.

We therefore perceive that the candlestick symbolised the seven emanations which form the בנין, all of which in turn are nourished from a higher source. When the Torah speaks of אל מול פני המנורה יאירו שבעת הנרות, "The seven lamps shall give light opposite the face of the candlestick" (Numbers 8,2), this means that the candlestick in the Tabernacle corresponded to and was "opposite" its counterpart in the Celestial Sanctuary. We view the candlestick as symbolising man. There are three arms or pipes on either side. The lower ones are longer than the middle ones, and the middle ones are longer than the upper ones which are nearer the centre-shaft. The lights all burned on the same level. The centre-shaft represented the גוף, torso or body of the candlestick. Man is like the candlestick. He has three projections on either side of him, the arms, the legs and the ears. The legs are longer than the arms, and the arms are longer than the ears, just as the lower arms of the candlestick were longer than the middle ones and the upper ones, respectively. The overall height of the candlestick was 18 handbreadths, the equivalent of three cubits, the height of an average-sized man from the ground to the shoulder (Tossaphot Shabbat 92).

What all this has to do with Samael injuring the כף ירך יעקב, the thigh joint of Jacob, is simple. Our sages say on 32,26: וירא כי לא יוכל לו, ויגע בכף ירכו ותקע כך ירך יעקב, that the thigh joint of Jacob refers to the later descendants who experienced the harsh decrees by the various nations who were their hosts in exile. When the Hasmoneans overcame the Greeks, they reversed this injury, i.e. the כף became a פך a cruse of oil. What had been a vulnerable part of Jacob's ירך now became the solid basis of the candelabra, ירך מנורה.