John 19:16-19 & 25-30 It Is Finished!

So he then handed Him over to them to be crucified.They took Jesus, therefore, and He went out, bearing His own cross, to the place called the Place of a Skull, which is called in Hebrew, Golgotha.  There they crucified Him, and with Him two other men, one on either side, and Jesus in between.  Pilate also wrote an inscription and put it on the cross. It was written, “JESUS THE NAZARENE, THE KING OF THE JEWS.”But standing by the cross of Jesus were His mother, and His mother’s sister, Mary the wife of Clopas, and Mary Magdalene.  When Jesus then saw His mother, and the disciple whom He loved standing nearby, He said to His mother, “Woman, behold, your son!”  Then He said to the disciple, “Behold, your mother!” From that hour the disciple took her into his own household.After this, Jesus, knowing that all things had already been accomplished, to fulfill the Scripture, said, “I am thirsty.”  A jar full of sour wine was standing there; so they put a sponge full of the sour wine upon a branch of hyssop and brought it up to His mouth.  Therefore when Jesus had received the sour wine, He said, “It is finished!” And He bowed His head and gave up His spirit.

When Jesus said "It is finished" what did he mean?  Jesus was sent into the world expressly to make a way for humankind to have everlasting life.  Yet not all people are saved, only those who receive Him as Savior.
But the work the Father had sent Jesus to do which involves total fulfillment of the law and to be the sacrafice by giving substitution death for the remission of sin.