(1) Whether God exists?

(2) The manner of His existence, or, rather, what is _not_ the
manner of His existence;

(3) Whatever concerns His operations--namely, His knowledge, will,
power.

Concerning the first, there are three points of inquiry:

(1) Whether the proposition "God exists" is self-evident?

(2) Whether it is demonstrable?

(3) Whether God exists?
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FIRST ARTICLE [I, Q. 2, Art. 1]

Whether the Existence of God Is Self-Evident?

Objection 1: It seems that the existence of God is self-evident. Now
those things are said to be self-evident to us the knowledge of which
is naturally implanted in us, as we can see in regard to first
principles. But as Damascene says (De Fide Orth. i, 1,3), "the
knowledge of God is naturally implanted in all." Therefore the
existence of God is self-evident.

Obj. 2: Further, those things are said to be self-evident which