All our knowledge begins with the senses...

Among all nations, through the darkest polytheism glimmer some faint sparks of monotheism.

Freedom is the alone unoriginated birthright of man, and belongs to him by force of his humanity.

Out of the crooked timber of humanity, no straight thing was ever made.

Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

The light dove, in free flight cutting through the air the resistance of which it feels, could get the idea that it could do even better in airless space. Likewise, Plato abandoned the world of the senses because it posed so many hindrances for the understanding, and dared to go beyond it on the wings of the ideas, in the empty space of pure understanding.

The sum total of all possible knowledge of God is not possible for a human being, not even through a true revelation. But it is one of the worthiest inquiries to see how far our reason can go in the knowledge of God.