What is the work of creation?
The work of creation is, God’s making all things of nothing, by the word of his power, in the space of six days, and all very good.
Genesis 1:1 (NASB)
In the beginning God created the heavens and the earth.
God created everything in the universe; there was nothing, and God created everything.
Hebrews 11:3 (NASB)
By faith we understand that the worlds were prepared by the word of God, so that what is seen was not made out of things which are visible.
It is by the Word that God created everything that now exist. He did not create from matter but created the matter. He did not create in time but created time.
Genesis 1:31 (NASB)
God saw all that He had made, and behold, it was very good. And there was evening and there was morning, the sixth day.
We should look at creation through God’s eyes; for what God created in six days is very good.
 The Shorter Catechism, 9.