Recent conversation has brought to mind the question of knowledge, particularly of knowing with certainty. There are a lot of people who fall under agnosticism because they hold that one cannot have any real certainty that there is a God, or, if there is, that we cannot have any certain knowledge about this God. There is such an intense focus on whether or not one can be certain that it has become an all-or-nothing question. This is because the question of certainty is directly connected to the question of reasonability. The question of having certain knowledge has become equivalent in the minds of many (unconsciously so) with the question of said knowledge being reasonable.
Among the pop-philosophy intelligentsia, it is no more or less reasonable to believe in God than to believe in magical unicorns or that we are all brains in vats. We cannot disprove that we are brains in vats, that there are magical unicorns, and we cannot disprove the existence of God. The argument for God is seen as a self-enclosed argument. But this is not actually the case. If we ask if it is reasonable to believe that there are magical unicorns or that we are brains in vats, we must emphatically answer “no”. If we ask if it is reasonable to believe that God exists, we must emphatically answer “yes”. Why? To hold to either of the former beliefs is to hold to something for which we have no evidence. To hold to the latter is to hold to something for which there is evidence. It is reasonable to believe that God exists because there is evidence that God exists. It is unreasonable to believe that we are brains in vats because there is no evidence that we are. One should be able to easily distinguish this.
However, the problem here is not simply of intelligence. There is also the problem of virtue. There are many who can see the difference between these questions if they listen. But then they will still hold that they cannot be certain, and, in their uncertainty, they will freeze in cowardice. It takes courage to follow the evidence. To how many in modern society can the words of the psalmist be applied: “The fool says in his heart, ‘There is no God'”?