Think about what causes everything to happen. Think about the real purpose behind all actions. Consider what pain actually is. What pleasure is. What death is. What fame or honor really means. Remember that each person is the source of their own peace and calm. No one else can truly get in your way. All of this is just thoughts and opinions in your head.
Again, to consider the efficient causes of all things: the proper ends and references of all actions: what pain is in itself; what pleasure, what death: what fame or honour, how every man is the true and proper ground of his own rest and tranquillity, and that no man can truly be hindered by any other: that all is but conceit and opinion.