while the love that reigns in the spiritual world is on the transcendental plane, that of the eternal soul. So this love itself is eternal, hence the fact that Krishna is described as "Cupid with eternal freshness".
As long as the spiritual being undergoes the conditioning of matter, he must observe a strict discipline with regard to morality and immortality. The absolute world is transcendental, free from such distinctions, since no defilement can reach it. But in this material world, carnal desire requires that we face a difference between virtue and vice. That is born the desire to serve Kṛiṣhṇa and will then disappear forever for the bondage imposed on us by the material body in a denatured existence. Only the consciousness of Kṛiṣhṇa, God, the Supreme Person, makes it possible to attain the highest perfection of existence. In the spiritual world, there are no sexual activities. The exchanges between lovers are born of a pure, transcendental love, and engender a perfect happiness, because based on the affection, the emotion and the pure feelings.
There are four forms of love for God corresponding to the attitude of service, friendship, parental affection and love. Each of the realized souls consider the feeling that animates it as being the most perfect. So she tastes with Lord Krishna a sublime happiness. However, if we compare the various feelings impartially, it appears that the feeling of love surpasses them all by its gentleness. No one is inferior or superior in transcendental relations with the Lord, since in the absolute kingdom all is of equal value. Yet, despite the absolute nature of such relationships, there are transcendental differences between them. Thus the purely spiritual relationship based on conjugal love is considered the highest perfection.
All spiritual beings who live in the spiritual world are aware of Krishna, God, the Supreme Person, and have only one desire, to make him happy. All are aware of being only the eternal servants of Krishna, the Absolute Divine Person. Any act that motivates such a sense of service is a pure love of God because it is accomplished for the absolute pleasure of the senses of Lord Krishna. This is the pure love they develop with respect to God.
There is a difference between sexual love and pure love. Sexual love is widespread in the material world and remains primary because it is only related to the pleasure that is concerned, that of the senses, whereas pure love is widespread and developed in the spiritual world. We must try to distinguish sexual love from pure love, because they are of different natures and an abyss separates them. They are as different from each other as the iron of gold. It is called lust, the desire to satisfy one's own senses, while pure love brings to fill the senses of Lord Krishna. Thus, the sexual act is the pleasure of the senses related to the material body and remains at the level of the animal, while pure love, practiced in the kingdom of God or spiritual world, is free of sexual intercourse. There, feelings, emotions are privileged and widespread, because much stronger, much more powerful, much stronger, much deeper, endless, and all directed to the satisfaction of God.