Principles of self-love may, indeed, contain universal precepts of skill (how to find means to accomplish one's purpose), but in that case they are merely theoretical principles; as, for example, how he who would like to eat bread should contrive a mill;
Norberaren maitasunaren printzipioak bil ditzake trebeziaren erregela orokorrak (asmoetarako bitartekoak bilatzea), baina printzipio teoretiko soilak dira (adibidez, gustura ogia jango lukeenak errota asmatu behar du).