His father just kept driving.
"Wasn't that our exit?" the lad asked.
"It sure was," the father said.
"Then why don't you turn back?" the lad asked.
"I know I should and I will someday," the father responded. "I'll have plenty of time for that later on."
Whatever you know you should do, don't wait for someday. The longer you go down the wrong road, the farther you will have to double back.