You are to do good work, whether you live or die. It may be that you will have to die; well, men have died for their country often, yet doing her no good; be ready to die for her in doing her assured good: her, and all other countries with her. Mind your own business with absolute heart and soul; but see that it is a good business first. That it is corn and sweet peas you are producing - not gunpowder and arsenic. And be sure of this, literally: you must simply die rather than make any destroying mechanism or compound.