The cross of Christ brought healing "he was bruised for our iniquities; the chastisement of our peace was upon him; and by his stripes healing was provided for us." but indeed the message of the cross brings healing too. Just as pharmaceutical companies do the work to create medicines but it still needs that doctors administer those nedicines else the work would not benefit the sick. The Holy Spirit testifies, yes, but "You also must testify". Christ builds the temple but the Holy Spirit commands in Jesus Christ's name "Build the temple". We can build and heal by preaching prophecies of the word of God and especially the word through Christ that "Christ died for all, the just for the unjust to bring you to God". This heals people of the sickness of the human condition and mortaility. But yes, God willing for Christ to be put up high on a cross where He bled died so all can consider Him there and live - this brings the healing. God raising Him from the dead brings life hope to all too.
