Eternal life through Christ is necessary because it is the only means by which sinners can be redeemed and have access to God's kingdom.
The necessity for Christ as the gateway to eternal life is rooted in the fallen state of humanity and the ultimate need for redemption. Adam and Eve were barred from the tree of life due to their sin, yet God provided a means of access through Christ ([Revelation 22:2](https://www.biblegateway.com/passage/?search=Revelation+22%3A2&version=KJV)). Christ's sacrificial death and resurrection opened the way for sinners to be reconciled to God, granting them eternal life (Acts 20:28). Only through faith in His blood can individuals escape the judgment due to their sins and be included among the redeemed who will enjoy everlasting communion with God in His kingdom.
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