Becoming a surgeon and making a mistake?

I'm sure I want to become a surgeon. I know the time, hard work and devotion it takes so please don't try and sway me saying things like its too hard because i don't care...I'm saving peoples lives and it makes me happy. But my real question is making a mistake? Ive heard that if you make a mistake that you will get fired and if serious enough jail time. I'm dedicated and can be patient but I'm afraid if I make a mistake I'll get fired and waste all the schooling time and wont get to practice what I love.I don't mean mistakes that are of incompetence or coverups or even overdoses...I mean mistakes such as accidentally making a bigger incision or cutting the wrong vessel or things to that effect that would cause injury or even death? Will I lose my job because of that?Everyone is human and I pray that I would never have to come across that situation but what if?