What does this mean Our doubts are traitors, and make us lose the good we oft might win, by fearing to attempt

Question

It's William Shakespeare

Answer 1

The thoughts you have.....to try or not try something are your enemies. By not attempting something you are considering, you may never know the "sweet smell of success " !!

Answer 2

When we start to second-guess ourselves, we fear to do whatever good we must, and thus fail in out attempts

Answer 3

That quote basically means when we start to second guess our self's or not do something out of fear we can lose the opportunity to do something great or experience something. So when he says "Our doubts are traitors.." he's saying that our inner voice can betray you.