Barth on ‘It is finished’

Jesus knew what God knew in the taking place of His sacrifice. And Jesus said what God said: that what took place was not something provisional, but that which suffices to fulfill the divine will, that which is entire and perfect, that which cannot and need not be continued or repeated or added to or superseded, the new thing which was the end of the old but which will itself never become old, which can only be there and continue and shine out and have force and power as that which is new and eternal.