The light is good in God’s sight, as he evaluates his own creation. It is right up at the front of creation: a gift to mankind, which will enable him practically and teach him so much.
In these things we are taught, and even Adam and Eve were taught, that though you are in a perfect environment and you are perfect people, you are still weak: you are dependant creatures. God has ordained that you need rest and that your bodies must be revitalised, perfect as they may be, and that you receive things from your God. And you must appreciate your environment. So the veil of night is drawn over it for so many hours. All these things are right there in the beginning and we understand so much from this in our own lives. God gives blessings, but not nose-to-tail blessings, one hundred per cent of the time. Of course we are always to appreciate them and thank him for them.
Some people come to you and they say, ‘Why do I lack assurance? For several days I have lost my assurance?’ And sometimes it is not sin or anything like that, it is because God has drawn clouds across the heavens so that you seek him afresh and you appreciate your assurance and your blessing. This is how God has worked even before the fall. You have light, you have darkness also, and it teaches us.
The light and the darkness form the first day, and we can be quite certain that here in Genesis 1 we are talking about 24-hour days. It is inescapable that it is a 24-hour day. If the light divides a period of light from a period of night, and it's described as the first day, it's inescapable that that is a 24-hour day. It cannot possibly be anything else. ‘And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day’: the same division of day and night continues through the chapter. The passage defines the length of the day, four times over. In fact, the Hebrew in verse 5 reads, ‘There was evening and there was morning, day one. Our translators have made that a little more elegant by saying the evening and the morning were the first day, to conform the verse with the last verse in the passage. There is no way out of that: it is a 24-hour day.