The verse 1 Samuel 12:21 from the King James Version of the Bible reads: "And turn ye not aside: for then should ye go after vain things, which cannot profit nor deliver; for they are vain."

This verse comes from the book of 1 Samuel, which is part of the historical books in the Old Testament. The historical books of the Bible recount the history of the nation of Israel, from its inception as a people through the period of the judges and the monarchies.

The context of this verse is important to understanding its full meaning. In this chapter, the prophet Samuel is addressing the Israelites, who have rejected their traditional system of judgeship in favor of a monarchy. Samuel, in his farewell address, recounts God's faithfulness to the Israelites and warns them not to turn away from God and serve other gods. He urges them to serve the Lord with all their heart and not follow after vain things that cannot profit or deliver.

The theme of this verse is the danger of turning away from God and following after vain things. The Israelites are being warned of the consequences of forsaking the true and living God for idols and the emptiness of the pursuit of things that have no real value. The theme of idolatry and the call to wholehearted devotion to God is a recurring theme throughout the Old Testament, as the Israelites struggled with turning away from the one true God to worship false gods.

The verse also carries the theme of the sovereignty and faithfulness of God. In the preceding verses, Samuel recounts God's faithfulness to the Israelites in delivering them from their enemies and providing for their needs. The warning against turning away from God is rooted in the understanding that God alone is the source of true profit and deliverance.

The symbolism in this verse lies in the contrast between the pursuit of "vain things" and the true profit and deliverance found in serving the Lord. The term "vain things" refers to anything that is empty, worthless, or devoid of real value. In the context of the Israelites, this likely referred to the worship of false gods, the pursuit of material wealth, and a reliance on human strength rather than God's provision. The symbolism here serves as a warning to prioritize the pursuit of God and His righteousness over the empty pursuits of the world.

The message of this verse is relevant for believers today. In a world filled with distractions and temptations, the call to wholeheartedly serve the Lord and not turn aside to pursue vain things remains a relevant and important exhortation. The verse serves as a reminder to prioritize our relationship with God, to seek His kingdom first, and to be aware of the emptiness and futility of pursuing things that do not ultimately bring true profit or deliverance.

In conclusion, 1 Samuel 12:21 from the King James Version of the Bible carries a timeless message about the dangers of turning away from God and pursuing vain things. The verse serves as a warning against idolatry and a call to wholehearted devotion to God. It offers a contrast between the emptiness of the pursuits of the world and the true profit and deliverance found in serving the Lord. This verse is a powerful reminder of the sovereignty and faithfulness of God and the importance of prioritizing our relationship with Him above all else.