8. If you dig a hole, you might fall into it. If you break down a wall, you might be bitten by a snake.
9. If you are moving large stones, you might be hurt by them. If you cut down a tree, you are in danger of it falling on you.
10. But wisdom will make any job easier. It is very hard to cut with a dull knife. But if you sharpen the knife, the job is easier.