What does man is his own worst enemy mean?

Answer 1

This phrase suggests that individuals often contribute to their own downfall or problems more than anyone or anything else. It highlights the idea that our own actions, choices, and behaviors can be more detrimental to us than external factors. Essentially, we are often the ones who create obstacles or harm ourselves the most.

Answer 2

You can be your worst enemy because you cause your own problems and can make a mistake and overreact. You just caused that problem plus some people criticize themselves and get angry at themselves.