The good blade
The egotist is at one time sharp and cutting swiftly, and the next he is dull, tired, and useless. He is like the one who excitedly over-sharpens his knife, which he then quickly blunts.
But the wise man is calm and steady. He has nothing in the balance, so nothing to lose. He never needs to sharpen his blade, as it is always perfect. His is the blade of the Infinite. He doesn't hack when he cuts. He works without effort, letting the blade glide unhindered about its work. No material is too tough for such a man, and such a blade.
The egotist, no matter how skilled, forces the blade on occasion through anxiety. It is now the blade fails and he makes a mess.