Jesus says:
« ...Do we not read in Genesis that God made man the overlord of everything on the earth, that is everything except God and His angelical ministers? Do we not read that He made the woman the companion of man in his joy and his domination over all living beings? Do we not read that they were allowed to eat of everything with the exception of the tree of the knowledge of Good and Evil? Why? What is the meaning of the words “that he might rule”? And what is the meaning of the tree of the knowledge of Good and Evil? Have you ever asked these questions, you man, who ask so many useless ones and never ask your soul about heavenly truths? Your soul would tell you, if it were alive, because a soul in grace is held like a flower in the hands of your angel, and like a flower it is kissed by the sun and sprinkled with dew by the Holy Spirit, Who warms and illuminates it, sprays and decorates it with heavenly lights. How many truths your soul would tell you, if you only knew how to converse with it, if you loved your soul that makes you like God, Who is a spirit, as your soul is a spirit. What a great friend you would have if you loved your soul instead of hating it to the extent of killing it; what a great and sublime friend with whom you could talk of celestial matters, since you men are so eager to talk and you ruin one another with friendships which, if they are not unworthy ones (as sometimes they are), they are almost always useless and they turn into a vain and damaging tumult of worldly words.
Did I not say: “If anyone loves Me he will keep My word, and My Father will love him, and We shall come to him and make Our home with him”? The soul in grace possesses love, and by possessing love it possesses God, that is the Father Who preserves it, the Son Who teaches it, the Spirit Who illuminates it. It therefore possesses Knowledge, Science, Wisdom, Light. Consider therefore what sublime conversations your soul could hold with you. Such conversations filled the silence of prisons, the silence of cells, the silence of hermitages, the silence of the rooms of holy sick people. Such conversations were the consolation of prisoners awaiting martyrdom, of cloistered monks and nuns searching for the Truth, of hermits longing for an advanced knowledge of God, of sick people in bearing, nay, in loving their crosses.
If you knew how to question your soul, you would be told that the true, extensive meaning – as comprehensive as creation itself – of the words “that he might rule” is this: “That man might dominate everything, that is his three states. The lower state, the animal one. The middle state, the moral one. The superior state, the spiritual one. And all three of them are to be directed to one sole aim: to possess God.” To possess Him by deserving Him through a strict control which subdues all the power of one's ego and conveys it to one only purpose: to deserve to possess God.
Your soul would tell you that God had forbidden the knowledge of good and evil, because He had already granted good to His creatures gratuitously, and He did not want you to know evil, because it is a sweet fruit to taste, but once its juice becomes part of your blood, it causes a fever that kills you and produces a parching thirst, so that the more one drinks of that false juice, the more thirsty one becomes.
You may object: “And why did He put it there?” Because evil is a force that originated by itself like certain monstrous diseases in the most wholesome body.
http://www.poem.strefa.pl/v1-017.htm