The candlestick of the Sanctuary was really seven candlesticks in one.
Since the seven-branch candlestick projected light, it performed a revelatory work in the Sanctuary.
The entire candlestick was supported by its central candlestick.
The similarities between a human face and the candlestick imply that we may accurately call the face the primary candlestick of the body-temple (1 Corinthians 6:19).
There are seven primary components of the human face – two ears, two eyes, two nostrils, and a mouth.
Since the human face is so expressive of human thoughts and feelings, and since it is so unique, it serves, more than any other part of the body, to reveal the identity of the person.
The survival of the body, and thus the face, is dependent on only one (central) facial component – the mouth.
2Co 4:6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.