We now begin to discern a first vague outline of the attitude signified by the word credo. It means that man does not regard seeing, hearing, and touching as the totality of what concerns him, that he does not view the area of his world as marked off by what he can see and touch but seeks a second mode of access to reality, a mode he calls in fact belief, and in such a way that he finds in it the decisive enlargement of his whole view of the world.
We are willing to accept as truth what we cannot perceive with our senses. This is what Credo means.

