Continuation:
According to Kant, if a person gained faith from the world around him, from his experiences, he would have to examine all things, processes, events, actions, and so on.
So, we should have experienced:
whatever happened;
whatever happens;
what will happen
on a cause-and-effect basis.
Of course, this is not possible, since they are endless.
Source used:
https://az.wikipedia.org/wiki/%C4%B0mmanuel_Kant