Many people say, "I don't think it matters much what religion a man professes, so long as he is thoroughly sincere!"
Just let us test the wisdom of such a notion. Your child is taken very ill, and you want the doctor. Every moment is important; you can't stop to put on your coat, but snatch up your hat and start off at a run.
You know the name of the street where the doctor lives, but have no idea where it is. Never mind that, make up for it by sincerity—run all the harder.
"Stop, friend, stop!" cries a neighbor who knows your errand. "You're going the wrong way."
"I can't stop," you reply, "I'm in too great a hurry."
"But your hurry is all lost time—you are getting further and further off."
"Never mind, I'm thoroughly sincere; look how hard I'm running."
But you never reach the doctor!
Sincerity on the wrong road means traveling faster to eternal destruction!