Sheep.

What does a shepherd do to an unresponsive sheep after trying for quite sometime? The two extremes: Give up or Cling on? I believe neither is the best answer. "Clinging on" seems like the model answer, however it isn't the wise thing to do. The shepherd will be drained over time.
Looking at the bible, at God's character, I found what i believe is the best way.
Like the story of the prodigal son: Take the 1st step and God will run to you.
Be available for that sheep, but let him take the initiative.
Let him know that you will always be available for him, if he desires.
It takes both hands to clap.