Exodus 27:20 in the King James Version of the Bible reads, "And thou shalt command the children of Israel, that they bring thee pure oil olive beaten for the light, to cause the lamp to burn always." This verse is part of a set of instructions given to Moses for the construction and maintenance of the tabernacle, the sacred tent that served as a place of worship for the Israelites during their time in the wilderness.

The setting of the book of Exodus is important to understanding the significance of this verse. The Israelites have been freed from slavery in Egypt and are journeying to the promised land under the guidance of Moses. The tabernacle was a central part of their worship and symbolized the presence of God among them as they travelled through the wilderness. The specific instructions given for the lamp and the oil in this verse are part of the broader set of instructions for the construction and operation of the tabernacle, which were intended to create a physical and symbolic space for the Israelites to commune with God.

The command to use "pure oil olive beaten for the light" reflects the importance of using the best and purest materials for the service of God. This emphasis on purity and excellence in worship is a common theme throughout the Bible, and serves as a reminder that God is worthy of our best efforts and resources. The use of olive oil for the lamp also has symbolic significance, as olive oil was highly valued in the ancient world for its use in lamps, as well as for cooking and anointing. The process of beating the olives to extract the oil was labor-intensive and required careful attention to produce the best quality oil. This process mirrors the effort and attention to detail required in worship and service to God.

The command that the lamp should "burn always" emphasizes the importance of continual worship and devotion. The lamp in the tabernacle was to be kept burning at all times, symbolizing the perpetual presence of God among the Israelites. This theme of continual worship is echoed throughout the Bible, and serves as a reminder that our devotion to God should be constant and unwavering.

The symbolic significance of light in the Bible is also important to consider in relation to this verse. Light is a common metaphor for God's presence, truth, and guidance throughout the Bible. In this verse, the lamp in the tabernacle serves as a physical representation of God's presence among the Israelites, and the pure olive oil that fuels the lamp symbolizes the source of that divine light. This imagery is echoed in the New Testament, where Jesus describes himself as "the light of the world" (John 8:12). The command for the lamp to burn always thus serves as a reminder of God's constant presence and guidance in the lives of the Israelites, as well as a foreshadowing of the coming of Jesus as the ultimate source of divine light.

In a broader theological context, this verse also points to the importance of worship and the symbolic significance of the tabernacle in the life of the Israelites. The detailed instructions given for the construction and operation of the tabernacle demonstrate the care and attention that God required in the worship of His people. The use of specific materials and processes, such as the pure olive oil for the lamp, underscore the importance of reverence and excellence in worship.

In conclusion, Exodus 27:20 contains important themes of purity, devotion, and the symbolic significance of light in the worship of God. The verse serves as a reminder of the importance of giving our best to God in worship and service, as well as the perpetual presence and guidance of God in the lives of His people. Through its specific instructions for the lamp and the oil, this verse also points to the broader theological themes of the tabernacle as a physical and symbolic space for communion with God.