At one point Dr. Livesay says to Jim Hawkins that "every step, Its you that save our Lives." Explain how this is true

In Chapter Thirty, Jim has made a bargain with Silver to stay with the pirates. Dr. Livesey has just come to care for the men in the stockade. Livesey encourages Jim to jump out of the stockade and run away with him..... away from pirates, but Jim refuses, as he has given his word. im knows where the ship is, and he is afraid he will reveal its location if he gives the pirates reason to doubt him. Dr. Livesey conceded that Jim has always done what's necessary to protect everyone.