Created out of nothing means created out of love
To say creation is ex nihilo is to say that divine love is the only power at work in the creation of everything.

Imagine being asked to give an account of the existence of your own life. You could say that you exist because your mother gave birth to you, and that she exists because she also had a mother. One can readily suppose the line of mothers to extend backward indefinitely.
But what about the conditions for the possibility of any kind of mothering/birthing process? Here you might speak about human communities and natural habitats that support human life. You might speak of a planet and biochemical processes that are so well suited to enable not just human life but all the life forms upon which people depend.
Now ask about the conditions for the possibility of planet Earth and its remarkable biospheres. You might respond by saying that Earth only exists as it does because it moves within a solar system that is itself within the Milky Way galaxy, one galaxy among countless others. It doesn’t take long before you gesture toward the existence of an unfathomably immense universe—and come to the realization, as many people have, that you are an embodied, if distant, effect of stardust.