Isaiah 26:3-4 in the King James Version of the Bible reads, "Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee. Trust ye in the Lord for ever: for in the Lord Jehovah is everlasting strength."

This passage is part of a larger context in the book of Isaiah, which is a prophetic book in the Old Testament. In this particular chapter, Isaiah is addressing the restoration of Jerusalem and the establishment of a new kingdom under the rule of God. The passage serves as a reminder to the people of Israel to place their trust in God and to keep their minds focused on Him in order to experience His perfect peace.

The themes present in this passage include trust, peace, and strength. The overarching theme is the reliance on God for all things, including inner peace and strength. The passage also highlights the importance of keeping one's mind focused on God in order to experience His peace, regardless of the external circumstances.

The context of this passage is one of uncertainty and fear for the people of Israel. They were facing political turmoil, foreign invasions, and the destruction of their city. In the midst of this chaos, Isaiah offers these words of comfort and encouragement to the people, reminding them that they can find peace and strength in God.

The symbolism in this passage is powerful and multifaceted. The image of being "kept in perfect peace" by God evokes the idea of a secure fortress or stronghold. This imagery suggests that God provides a place of refuge and safety for those who trust in Him. The concept of "everlasting strength" conveys the idea of God's unwavering support and stability, even in the face of uncertainty and crisis.

The phrase "whose mind is stayed on thee" emphasizes the importance of focusing one's thoughts and attentions on God. This suggests that true peace and trust in God come from a deep, unwavering commitment to Him. It also implies that the source of inner peace and strength is directly related to one's relationship with God and their level of trust in Him.

In a broader theological sense, this passage speaks to the nature of God as a source of peace and strength. It affirms the belief that God is trustworthy and reliable, and that He offers His followers a sense of peace and stability that transcends human understanding. The passage also reinforces the idea that placing one's trust in God is the key to experiencing His peace and strength.

In conclusion, Isaiah 26:3-4 in the King James Version offers a powerful message of hope and assurance to those who are facing uncertainty and turmoil. It serves as a reminder that true peace and strength are found in God, and that those who trust in Him will be kept in perfect peace. This passage speaks to the timeless truth that God is a source of unwavering strength and security for those who place their trust in Him.