The name of the Lord is a strong tower....the righteous run into it and are safe..Proverbs 18:10. In John's gospel ch.10 vs.9 "I am the door" and Jesus is referring to a sheepfold when He makes that statement. The sheepfold was a natural enclosure, if the shepherd could find one, or else he would take some stones or other natural material such as wood and build a sort of corral.

Then at night he would round them all up and lead them in to the fold.

When the fold was being built, the shepherd always left a "narrow" opening or gate for the sheep to enter and exit through. "Narrow is the gate and difficult is the way that leads unto life, and there are few that find it."Matt. 7:13b. Then the shepherd became the door. He would literally become the door because after the sheep were all herded into the sheepfolds at night, he would lie down across the doorway and close off the exit. Jesus is not only the way to the fold but He is the door also.

This is in total agreement with our theme and we are safe there in the sheepfold or the strong tower because we are trusting in that name and one of the names is the Door.