Andrew, the protagonist of the story Birth, utters these words as he able to bring a stillborn child back to life which seemed impossible in the beginning. The child is born still to the wife of Joe Morgan. aut after feverish efforts Andrew is able t) bring the child back to the life. He utters these words out of deep satisfaction on achieving the seemingly impossible task. It means that Andrew has been able to do something wonderful. He has been able to apply whatever he learnt in the medical textbooks and even beyond that. It is really a great achievement for Andrew. The above
words mean that a doctor is a medium through which God or Almighty grants life to the patients. Andrew acknowledges this fact in the above quoted words.