XXII. (87) See now the difference between him who turns to sin in the desert and him who sins in Egypt. For the one is bitten by serpents which cause death, that is to say by insatiable pleasures which inflict death; but the other, he who meditates in the wilderness, is only bitten by pleasure and driven astray, but is not killed. And the one, indeed, is healed by temperance, which is the brazen serpent which was made by the wise Moses; but the other is supplied by God with a most beautiful draught to drink, namely, wisdom, from the fountain which He himself has brought forth out of his own wisdom. (88) Nor, indeed, does the pleasure which is in the form of a serpent, abstain from attacking that most sincere lover of God, Moses, for we read as follows; "If, therefore, they will not obey me, nor listen to my voice--for they will say, God has not been seen by you--what shall I say to them? And the Lord said unto Moses, What is that which is in thy hand? And he said, A rod. And God said, Cast it on the ground. And he cast it on the ground, and it became a serpent, and Moses fled from it. And the Lord said unto Moses, Stretch forth thy hand, and take hold of it by the tail. And having stretched forth his hand, he took hold of it by the tail, and it became a rod in his hand. And the Lord said unto him, That they may believe Thee."[Ex 4:3.] (89) How can any one believe God? If he has learnt that all other things are changed, but that he alone is unchangeable. Therefore, God asks of the wise Moses what there is in the practical life of his soul; for the hand is the symbol of action. And he answers, Instruction, which he calls a rod. On which account Jacob the supplanter of the passions, says, "For in my staff did I pass over this Jordan."[Ge 32:10.] But Jordan being interpreted means descent. And of the lower, and earthly, and perishable nature, vice and passion are component parts; and the mind of the ascetic passes over them in the course of its education. For it is too low a notion to explain his saying literally; as if it meant that he crossed the river, holding his staff in his hand.