My dear,
Believe those who are seeking the truth. Doubt those who find it.
Doubt them because you know truth is a hard thing to find. Doubt them because a man can lie so easily. Doubt them in order for you to go out and find your own truth. And doubt them because doubt should always be the first stance you take.
Doubt them, until you cannot doubt them any longer.
Falsely yours,
André Paul Guillaume Gide