How do we know that eternal life is found in Christ alone?

The promise of eternal life is directly linked to Jesus Christ, as expressed in 1 John 5:11, which states that this life is in His Son. Our Lord Jesus affirmed His role as the only means to eternal life in John 14:6, declaring, 'I am the way, the truth, and the life.' The assurance we have is based not on our merits but on God's covenant promise given before the foundation of the world (Titus 1:2). Eternal life is a gift of grace, irrevocably tied to our relationship with Christ. There can be no spiritual life apart from Him, and those who have the Son have life, while those who do not, do not have life.