John 17:25 (KJV) reads, "O righteous Father, the world hath not known thee: but I have known thee, and these have known that thou hast sent me."

This verse is part of the prayer of Jesus in the Gospel of John, often referred to as the High Priestly Prayer. It occurs during the Last Supper, just before Jesus is arrested and taken to be crucified. In this prayer, Jesus is interceding on behalf of his disciples and future believers, asking for protection, unity, and sanctification.

The verse begins with Jesus addressing God as "O righteous Father." This phrase conveys a deep sense of reverence and acknowledgment of God's holiness and justice. Jesus is acknowledging the character of God as being perfect and morally upright, which is in contrast to the fallen nature of the world.

The second part of the verse continues with Jesus lamenting that "the world hath not known thee." This is a poignant statement about the spiritual state of the world. Despite God's continuous revelation of Himself through creation, the law, and the prophets, the majority of people remain ignorant and alienated from Him. The world is often described in the Bible as being under the sway of the evil one (1 John 5:19), and Jesus here is acknowledging that the world's rejection and ignorance of God are a direct result of its fallen state.

However, Jesus then makes a profound declaration: "but I have known thee." Here, Jesus asserts that He alone has an intimate and perfect knowledge of the Father. As the Son of God, Jesus shares a unique and unbreakable bond with the Father. Throughout the Gospels, Jesus repeatedly speaks of His close relationship with the Father, emphasizing their unity and oneness. In knowing God, Jesus embodies the divine wisdom, love, and righteousness, which is evident in His teachings, miracles, and ultimately His sacrificial death on the cross.

And finally, Jesus affirms that His disciples have also come to know that the Father has sent Him. This statement encapsulates the purpose of Jesus' earthly ministry: to reveal the Father and to bring salvation to humanity. Through His teachings, miracles, and ultimately His death and resurrection, Jesus has made known the Father's love, mercy, and redemption to His disciples. They have witnessed His divine authority and have accepted His identity as the promised Messiah and Son of God. This knowledge has not only transformed their lives but also empowered them to become messengers of the Gospel to the world.

In this verse, several themes are evident, including the holiness and righteousness of God, the fallen condition of the world, the unique relationship between Jesus and the Father, and the revelation of God's purposes through Jesus' ministry. The verse also serves as a potent reminder of the importance of knowing and acknowledging God in a world that is often hostile to His truth.

Symbolically, this verse also represents the redemptive work of Christ and the call to discipleship. It emphasizes the role of Jesus as the way, the truth, and the life (John 14:6), and the necessity of knowing Him to have a relationship with the Father. It also underscores the mission of the disciples to bear witness to the truth of Christ in a world that is spiritually blind and hostile to God's kingdom.

In conclusion, John 17:25 (KJV) is a powerful and profound declaration of Jesus' intimate knowledge of the Father and His divine mission to reveal God's love and salvation to the world. Through this verse, believers are encouraged to deepen their understanding of God, recognize the fallenness of the world, and embrace their role as ambassadors of Christ's redemptive message.