My advice to you, if you should ever be in a hold up, is to line up with the cowards and save your bravery for an occasion when it may be of some benefit to you.
Louis Pasteur, the great scientist, said "chance favours the prepared mind", which is a posh way of saying 'do your homework', but it's an excellent piece of advice.
I counseled many returning missionaries. I interviewed 1,700 missionaries all over the world. My advice to them is that you should study and prepare for your life's work in a field that you enjoy.