'Truths' in the Bible

For this reason [that is, because of God’s final revelation in His Son Jesus and because of Jesus’ superiority to the angels] we must pay much closer attention than ever to the things that we have heard, so that we do not [in any way] drift away from truth.

In fact, though by now you should be teachers, you still need someone to teach you the basic truths of God's word. You have become people who need milk instead of solid food.