[61] To such great and indispensable advantages do the natures of the heavenly bodies and the motions of the stars tend. And to how many other things might I also affirm that they contribute which are as yet unknown to us? for all things are not known to the will of man; but of the things which contribute towards the durability of the universe, those which are established by laws and ordinances which God has appointed to be unalterable for ever, are accomplished in every instance and in every country.