Christ is so called, because he gives life to dead sinners: men in a state of nature are dead in trespasses and sins; and whatever they feed upon tends to death; Christ, the true bread, only gives life, which is conveyed by the word, and made effectual by the Spirit: and because he supports and maintains the life he gives; it is not in the power of a believer to support the spiritual life he has; nor can he live on anything short of Christ; and there is enough in Christ for him to live upon: and because he quickens, and makes the saints lively in the exercise of grace, and discharge of duty, and renews their spiritual strength, and secures for them eternal life.

Commentary from John Gill’s Exposition of the Bible