Genesis 1 days

Our time consists neither in millions of years nor in a single instant but is made up of real days. If we filch from Gen. 1 the relationship of light to a real day, the relationship of light to our time is destroyed, and Gen. 1:3f. ceases to be a proclamation of the meaning of history and becomes a more or less interesting, credible and binding scientific or philosophical theory. If it is more likely that the purpose of the story of creation in Genesis - of the beginning of the history of the covenant and salvation developed in the Old Testament - is to instruct us in the sense of this proclamation rather than of such a theory, it follows that we must take the "days" of which it speaks, and especially the "day" of Gen. 1:3f., in the literal sense of the term. CD vol. III.1, p.126.