Genesis 3:17

Knowledge of good and evil] i.e. moral consciousness issuing in moral judgment; the power to distinguish between good and evil, not in act only but in consequence as well. This faculty is necessary, in order that man may reach moral maturity. The narrative implies that it would have come gradually to man, through the teaching of God, and without the loss of his own uprightness. It is a faculty which is developed from within, not conferred from without. By discipline and self-control man gains character and moral strength, or the knowledge of good and evil, and the power to discriminate between them. Hence 'the fruit of the tree of the knowledge of good and evil' is forbidden to man, not given to him like that of the others. It can impart the knowledge of good and evil at once, without a prolonged process of discipline or education; but the attainment of it in this summary way is made an act of disobedience, perhaps to assist man's moral development by affording a test of his self-control. Man's freedom of choice, however, makes it possible for him to disobey, and so come to the required knowledge by a wrong way; for the knowledge of good and evil is bought dearly by doing ill.

Shalt surely die] Man, it is implied, was created mortal, but had the privilege of attaining immortality by means of the tree of life. But by eating of the tree of the knowledge of good and evil man forfeited his liberty to eat of the tree of life (see Genesis 3:22). This implies that the physical is the consequence of the moral death. 'Some of the older expositors observe that the troubles and sufferings to which man became liable through sin, are nothing else than disturbances of life, the beginning of death' (D.).*

18-25. Now the other animals and woman are formed. The order of Creation is not the same as in Genesis 1:24.