The man who has a hammer

There is a proverb as follows.

"The man who has a hammer considers everything to be nails."

This proverb is a meaning "The man tends the conviction of his own Arms as the most valuable one."

In addition, this proverb warns "The man who has only one arms tends to fall into the tunnel vision".

However, many wastes that cannot become arms are only worthless.

I want to acquire a lot of arms through the work.