Isaac’s wife Rebekah was very beautiful. The men of that place asked Isaac about Rebekah. Isaac said, “She is my sister.” Isaac was afraid to tell them Rebekah was his wife. Isaac was afraid the men would kill him so that they could have her.
Don’t be afraid of people. They can only kill the body. They cannot kill the soul. The only one you should fear is the One (God) that can destroy the body and the soul. He can send the body and the soul to hell.
But David thought to himself, “Saul will catch me some day. The best thing I can do is to escape to the land of the Philistines. Then Saul will give up looking for me in Israel. That way I will escape from Saul.”