What is the Catholic teaching on creation?
Did God create only in the beginning (in the seven days) or is God still actively creating today?
If we observe a new species evolving (like bacteria resistant to anti-biotics) is it really God who creates the new bacteria?
I am sorry that people gave such poor answers.
In the context of your question. There are two kinds of acts. There is the distinct way that a particular nature behaves according to laws, and then there is also the act of its reality.
Act: The Act Of Reality
When speaking about the act of reality, every new thing is an actualisation of potential. That which is only potential has no existence (
accept as an abstraction in Gods mind) and since out of nothing comes nothing that potential therefore cannot become objectively actual without that which is the supreme act of reality (God). Even when a new thing becomes actual, there is still an objective distinction between its act (
existence or esse) and its nature (essence). An essence never becomes its own intrinsic act of reality since it is by definition contingent upon
supreme reality in order to be
real, and therefore must always remain contingent upon it. It cannot be its own act. Only God is his own act of reality and that is why God is eternal.
Therefore God is always
creating insofar as God is required in-order to actualize all pending potential.
We must maintain this distinction at all times in-order to understand what it means for God to
conserve a new nature in existence; because if God merely creates essences with there own intrinsic act of reality, it then becomes meaningless to speak of God
conserving or
sustaining them in reality since they have already been given their own act of reality and thus do not need to be conserved in it.
Act: The Act Of Behaviour
When speaking of act in the sense of “behaviour”; we can understand evolution as a natural expression of the attributes intrinsic to physical natures insofar as laws and principles are concerned. God does not interfere with these events and neither does he have to, since he has already put laws and principles in place to define their behaviour when they become actual beings. In other-words while it is true that it is God that makes them actual animates them, it is however not true that God interferes with their particular kinds of natural behaviour insofar as what happens to be true of their nature.
The only time God gets involved with natural behaviour is when human ensouled beings call upon or invoke God in reference to their eschatological destiny. He may also get involved in a very intimate manner if it benefits our salvation, such as the “Christ-Event”.