tetelestai – from τέλειος (teleios): According to Strong’s Concordance: having reached its end, i.e. complete, by extension, perfect. It incorporates the sense of maturity, fullness of purpose,
One word; a world of meaning. It occurs, in various forms of the word, 19 times in the New Testament. It is used to instruct us how we are to be: Matthew 5: 48, 1 Corinthians 2:6; what we are to do: Matthew 19:21, 1 Corinthians 14:20; and what we are to be in Christ: Colossians 1:28. It is also used to tell us about the character and nature of God, both God the Father and God the Son Jesus: Matthew 5:48, Romans 12:2, 1 Corinthians 13:10. (For all occurrences, see Strong’s Greek.)
It is what we are to strive for, it is what we are when we are in a relationship with Christ. But it’s ultimate usage?
τετελεσται. It is finished.
At the moment this word was spoken by Jesus, it was finished: the work of salvation and redemption was complete, sin was fully washed away, fullness of life eternal was accomplished for they that would accept the gift from the Giver.
Are we ever ‘there yet?’ Not in this life. We must always seek spiritual maturity, growth. We are to walk with Jesus, following His example as to how to live, think, believe, do. But our Abba,Father, sees us through His Son as complete, full, mature. There is nothing that we can add – no works, no rituals or rites, no penances, nothing – to Jesus’ finished work on the cross that will gain salvation or get us into heaven. Jesus finished, completed and fulfilled ALL that is needed for eternal life for those who will believe in Him. Praise the Lord, the work is done! Tetelestai – It is indeed finished.