Ecclesiastes 10:8-10

8If you dig a deep hole, you might fall into it. If you knock down a wall, a snake might bite you.

9If you cut stones out of the ground, a stone might hurt you. If you cut wood into pieces, a piece of it might hurt you.

10If your axe is not sharp, you will need to be very strong to use it. If you are wise, you will make the axe's edge sharp again. That is how wisdom helps you to do things well.