If he is someone who has a low tolerance for long will go back, but you can't. Until you walk to your destination. Although just how tired he is impatient to go. Never turn back
If he is a person who has a low tolerance. Went a long way back then. But it is not like that. Walk until you arrive at your destination Although tired, do you have the patience to walk on. No turning back
If he has a low tolerance for pain. Walk long"s back. But you are not. You walk to the destination. Although tired you have patience to walk, no turning back.