The surrounding circumstances may be conditions, may be occasional causes, may be predisposing causes, but they are not, and cannot be, producing or efficient causes.
We have final causes, instrumental causes, occasional causes, predisposing causes, efficient causes, and many others.
Leibniz speaks of supposes a decree of God, and shows wherein this system agrees with that of occasional causes.
Besides, the reason why this learned man does not like the Cartesian system seems to me to be a false supposition; for it cannot be said that the system of occasional causes brings in God acting by a miracle (ibid.
But this would be Deus ex machina, as much as in the system of occasional causes.
This he could say also (in accordance with his principles) of the communication between the soul and the body, since God effects this whole communication in the system of occasional causes to which this author subscribes.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "occasional causes" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.