Reply to Objection 2: Although the heavenly bodies and spiritual things differ in the genus of their nature, still they agree in having a changeless being, and are thus measured by aeviternity.
Reply to Objection 3: All temporal things did not begin together; nevertheless there is one time for all of them, by reason of the first measured by time; and thus all aeviternal things have one aeviternity by reason of the first, though all did not begin together.
Reply to Objection 4: For things to be measured by one, it is not necessary that the one should be the cause of all, but that it be more simple than the rest.