False. positive thinking can lead you to your goal. wishful thinking will keep you in the same place just wishing for it instead of getting it
1) Brain Cancer. ...
2) Increases stress level. ...
3) Weakens immune system. ...
4) Chronic pain. ...
5) Eye/ vision problems. ...
6) Hinders sleep. ...
7) Germs. ...
8) Hampers your thinking process.
Because they might not explain it clearly or right ,they might go mad if you don't put the answer they told you,and they think their always right.