The words of the wise are like cattle prods—painful but helpful. Their collected sayings are like a nail-studded stick with which a shepherd drives the sheep.
In fact, in his public ministry he never taught without using parables; but afterward, when he was alone with his disciples, he explained everything to them.
speaking of these things in all of his letters. Some of his comments are hard to understand, and those who are ignorant and unstable have twisted his letters to mean something quite different, just as they do with other parts of Scripture. And this will result in their destruction.