What is you favourite existential eveidence for the existence of God?
Are there any good evidences for God that deal with existential questions?
What would you tell someone who consideres himself an agnostic?
Do you mean a philosophical proof for God’s existence? In my opinion, the only valid way is what philosophers call the
via causalitatis.
The idea is, you start with some indisputable reality (but it has to be something real and concrete, like the many changes that are seen in world, or the differing intensity of goodness and beauty, and things like that: not abstractions or logical propositions). From there, you deduce that this reality must have an ultimate cause (because things can’t cause themselves, and real effects must have real causes). If we reflect on how multiplicity and change work, we note that there can be only one First or Ultimate Cause; and this must be God.
That is the
via causalitatis in a (very brief) nutshell, made famous by Thomas Aquinas’ Five Ways.
I don’t know if the Five Ways are all that useful as a pastoral practice to help an agnostic, unless he is extremely sharp and intellectual. They are extremely useful in order to understand how reality works (which is the subject of the discipline of metaphysics), but they certainly do have a learning curve.
Perhaps a more interesting approach is to use the same method (the
via causalitatis) but this time taking properly supernatural realities into account.
For example, how do we account for the fact that many thousands of people have given up their lives for the sake of Jesus Christ? Are they all deluded? How do we account for the fact that hundreds of young women enter, say, the Missionaries of Charity, so as to serve the poorest of the poor? I think we all agree that Blessed Theresa of Calcutta was not deluded, but it also not realistic to think that young women would do the work that the Missionaries do unless they had supernatural help.
Or else look at the Church. There is a story told about Napoleon Bonaparte. He wanted to claim an imperial authority that was greater than the Church’s: for example, he famously abducted Pope Pius VII, made the Pope crown him emperor, and then, at the last moment, seized the crown from the Pope’s hands and set it upon his own head. In any event, at one moment he was negotiating with a cardinal; in a moment of frustration he declared, “Do you not realize that I have the power to destroy the Church?” The cardinal replied, “Your majesty, we, the Catholic clergy, have done our best to destroy the church for the last 1,800 years. We have not succeeded, and neither will you.”
There is a lot of truth to that. How has the Church survived its long history of heresies, schisms, sandals, sins, debacles, and intrigues, and yet
still produces such examples of holiness today?
As you can see the reasoning is actually the same: take an undeniable reality and see that it can only have been brought about by supernatural help. The difference is that we are starting with realities that are, so to speak, closer to the Creator, and hence it is easier to see the connection.