Eternal Life begins in the life of an individual when they hears and believe in the words of salvation and redemption; surrender their life to Jesus Christ for the redemption of their soul from the power of sin and darkness. They pass from death to life; they they are translated/transferred from the kingdom of darkness into the kingdom of light.
Scriptures: "Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son: (Colossians 1:13).
"He that hears my words and believes in him that sent me, has everlasting life, and shall not come into condemnation; but is passed from death into life. (John 5:24).
"That whoever believes in him may have eternal life". (John 3:15)