 Look at the words, grow in grace, grow in knowledge. Look at the order of the words. I'm such a stickler in inerrancy, I believe even in the order of the words of the text. He mentions grace before he mentions knowledge. I think they are to be kept balanced, but of the two, be gracious along with knowledge. Keep learning, but don't let your learning outrun your grace. Stay full of grace, but don't let it lose knowledge.