[100] [cap.27] And as to the manner in which the mind becomes accursed upon the earth, he adds further information immediately afterwards, saying: "The earth which opened her mouth to receive the blood of thy brother." For it is very difficult for the mouths of the outward senses to be opened and widened, as even when they are not open the flood of the objects appreciable only by them rushes in like an overflowing river, nothing being capable of resisting their evident impetuosity; for then the mind is found to be overwhelmed, being wholly absorbed by so vast a wave, and being utterly unable to swim against it, or even to raise its head above it;