Whatever you want to do, whatever you plan to do, do it all as someone who might die right now. And as for death, if there are gods, leaving human society is nothing terrible. You can be sure the gods will not harm you.
Whatsoever thou dost affect, whatsoever thou dost project, so do, and so project all, as one who, for aught thou knowest, may at this very present depart out of this life. And as for death, if there be any gods, it is no grievous thing to leave the society of men. The gods will do thee no hurt, thou mayest be sure.