23 But, he says, the rites of our ancestors ought to be retained. But what, seeing that all things have made progress towards what is better? The world itself, which at first was compacted of the germs of the elements throughout the void, in a yielding sphere, or was dark with the shapeless confusion of the work as yet without order, did it not afterwards receive (the distinction between sky, sea, and earth being established), the forms of things whereby it appears beautiful? The lands freed from the misty darkness wondered at the new sun. The day does not shine in the beginning, but as time proceeds, it is bright with increase of light, and grows warm with increase of heat.
Source: Letters (New Advent)