To saw human being that their is no division btwn man and God.

Becoz if he never suffered the penalty we could not have been forgiven and he could not have carrried away our sins so we could have remained sinners.

So that man may not suffer spiritual separation from God  and that everyone can enter in the presence of God freely becoz the penalty have been paid and we are free.

 His mission was accomplished and ours to to seek him with all our hearts and to love him fully and turn away from all our wicked ways.

He also came to serve but not to be served and to give his life as a ransom for many.

If it was just spiritual separation from God we could have not experience the power of forgiveness of our sins  and that's why he was to suffer to saw the humanbeings how he loved them.