Veteran’s Day. Armistice Day. The anniversary of the cease fire at the end of… World War I. Here’s a quote from then:
That for which the world has long sighed, which Christianity has implored with such fervent prayer—that has come in a moment: at last, the clash of arms has ceased. The road to peace has been opened happily with the Armistice, which has suspended slaughter and devastation by land, sea, and air. Many reasons could be given to explain the suddenness of the event; but if the supreme reason be sought, there is no other way but to look above to Him who rules all events. Moved to compassion by the unceasing prayers of His servants, He now lets humanity breathe again after so many trials and sorrows.
Whose words? Pope Benedict XV. Let’s take pride in being Catholic on this anniversary day. Because the Pope of Rome was the unsung hero of a hundred years ago. He charted the course to peace, even though Woodrow Wilson wound up taking the credit for the pope’s good ideas. In eastern Europe and Turkey, they knew how much Pope Benedict had done for countless suffering people during the war. They built a monument to him in Istanbul.
We read at Holy Mass today: The Spirit of the Lord fills the world. (Wisdom 1:7)
‘The world.’ ‘The cosmos.’ ‘The universe.’ Whatever you want to call it. The place with land, sea, and sky. With sun and moon and stars at night. The place where you can find a good steak, as Woody Allen put it. Our milieu.
We have to acknowledge this, about this milieu of ours: If God had not taught us, we would not know whether the universe had a beginning, or just always was. We do, in fact, know that it had a beginning. But we know that not because we have any certain evidence of our own, but because we accept the authority of the source that teaches us about it. Namely, the written Word of God.
Now, you might respond: Father, haven’t you heard about the Big Bang Theory? You should have. After all, it has its own sitcom, not to mention a spinoff called Young Sheldon. Don’t you know that the Big Bang Theory has demonstrated the truth that the universe had a beginning, Father? Just like the Bible says. It’s a win for us, Father. Come on.
Au contraire. This is an apologetics trap. The famous atheist Steven Pinker argues that the Big Bang Theory hardly demonstrates that creation occurred. As far as the theory goes, the Big Bang could have followed a previous “Big Collapse.” Which in turn followed a previous ‘Big Bang,’ which had followed a prior Big Collapse. And so on. The Big Bang Theory does not suggest that this milieu of ours necessarily had a beginning, wrought by God.
Rock-solid argument. But has Pinker checkmated us and left us with nothing but atheism? Hardly. We can and should concede that we Christians believe in Creation. We know you cannot prove that it happened. After all, it completely transcends our ability to imagine. God made this milieu of ours out of nothing, and us, too. We cannot conceive of the Maker or the manner of making. We believe in God’s act of making the visible and invisible creation.
But that doesn’t mean that we can’t demonstrate that God certainly exists. His Spirit fills the world. St. Thomas Aquinas never tried to prove that God created the world in the beginning. St. Thomas proved that the world would not exist right now without God giving it existence. Modern atheists try to prove their points, taking existing things for granted. St. Thomas proved his point by not taking anything for granted. That’s called: metaphysics.
The universe could be eternal, as far as we know from simple observation. But nothing we see now is eternal. And all of it moves, in some way, having been set in motion by some force external to it. And everything we see came to be because something caused it to come to be. We can trace temporary, consequential things and motions back to other temporary consequential causes and motions, through many steps, but not all the way back to… infinity. Infinity is, by definition, not temporary and consequential. Infinity is… God. That’s the point.
Which means that God certainly exists. Because if He didn’t, we wouldn’t, either, nor anything else. That’s basic metaphysics.
By the gift of faith, we know much more: about the beginning and the End, about the meaning of life, about divine love and everything worthwhile.
Father Mark White Blog 
If you pin down some atheists (Dawkins, e.g.) for an explanation of the “uncaused first cause,” they will flounder and offer “perhaps a super-intelligent race of beings” as a possibility. That’s a huuuuge perhaps.