Yes, many have tried and are still trying. They obviously haven’t been convincing enough for many.
The existence of God is obviously not self-evident, otherwise there would be no need to prove it. But God’s existence can be reached by reason, unaided by divine revelation; for example, it can be proved by philosophy. And I think that some philosophers have succeeded in doing that. St. Thomas Aquinas was one of them. That other philosophers rejected his proof (or proofs) does not mean that his proof was refuted or that it was not convincing. Some simply reject it because they are not prepared to accept the moral obligation that God’s existence would imply. But I will stop discussing that issue here because its thorough discussion would require another thread.
I just want to mention, however, that some people find God, not by the method of philosophy or by discursive reasoning, but by other equally valid ways. As Jacques Maritain once said, “there are as many approaches to God as there are paths leading to the human heart.” Some people find God in the good example or mercy of other believers. Others find God by an intuitive approach, in their pursuit of beauty, in music, or the arts or even in their scientific research. Then in the present world there are also many who find God in their frustrations, in the emptiness of their lives, and in their moral wreckage. In all these other ways man is discovering God also by the use of reason unaided by revelation, but not necessarily by philosophical thinking.
In this connection I’d like to quote a passage from the late Fulton Sheen. In his book, *Peace of Soul *(Chapter 1), he said that modern man is different from men of earlier generations. “For one thing, the modern soul no longer looks to find God in nature. In other generations, man, gazing out on the vastness of creation, the beauty of the skies, and the order of the planets, deduced the power, the beauty, and the wisdom of God Who created and sustained that world. But the modern man, unfortunately, is cut off from that approach by several obstacles: he is impressed less with the order of nature than he is with the disorder of his own mind, which has become his main preoccupation… This change in our times does not mean that the modern soul has given up the search for God, but only that it has abandoned the more rational - and even more normal way - of finding Him. Not the order in the cosmos, but the disorder in himself; not the visible things of the world, but the invisible frustrations, complexes, and anxieties of his own personality - these are the modern man’s starting point when he turns questioningly toward religion. In happier days, philosophers discussed the problem of man; now they discuss man as a problem.”
The attributes and actions of God, however, are purely items of faith.
Not all attributes and actions of God are
purely items of faith because some of them are also discoverable by reason. For example, a philospher who knows that God is a necessary being (that means, a being that does not depend on another for existence), would know that if God exists, then He would also have no beginning and no end. Likewise, although the Procession of the Son and the Holy Spirit are strictly above reason, God has exterior actions in the world knowable by reason without revelation, such as the fact of God’s Providence and His governance of the world. Certainly, these actions of God can also be objects of faith, but they can also be attained by reason unaided by divine revelation.