Again, no one deliberates about things which change, but always change in the same way (whether the cause of change be necessity, or nature, or any other agency), e.g. the solstices and the sunrise; 50 nor about things that are quite irregular, like drought and wet; nor about matters of chance, like the finding of a treasure.
Again, even human affairs are not always matter of deliberation; e.g. what would be the best constitution for Scythia is a question that no Spartan would deliberate about.
The reason why we do not deliberate about these things is that none of them are things that we can ourselves effect.