The world could only be known as it existed in men's hearts

He told the boy that although he was huérfano still he must cease his wanderings and make for himself some place in the world because to wander in this way would become for him a passion and by this passion he would become estranged from men and so ultimately from himself. He said that the world could only be known as it existed in men's hearts. For while it seemed a place which contained men it was in reality a place contained within them and therefore to know it one must look there and come to know those hearts and to do this one must live with men and not simply pass among them.

Cormac McCarthy, The Crossing (Picador, 2011) p. 137