These four source causes lead the soul to suffering and material slavery.
Oblivion occurs at the moment of death. The soul, enclosed in its ethereal body, is transported by the attendants of Lord Krishna to the womb of a new mother, who will thus give it a new material body. This is the material body, which plunges the incarnated spiritual being into forgetfulness of everything; of God, of his previous life,
of his true identity, of real existence...This forgetfulness is accentuated by the external energy or material energy of the Lord in his form of material nature, which influences the incarnated being by its attributes and modes of influence; virtue, passion and ignorance. In reality, death is synonymous with oblivion.
The second source is the false or material ego. The false ego is the force that binds the incarnate being to material existence. This force, which pushes the incarnate being to identify with his body and to want to dominate matter, is at the origin of the conditioning of the being to matter.
The three forms of false ego are: The domination of material nature, identification with its body, and the grabbing of all material possessions. The main function of the false ego is to plunge the being into ignorance and to maintain atheism.
Three doors open to hell: concupiscence, anger and greed. Let every sane man close them, because they lead the soul to its loss. Such are the origins of demonic life.
Man seeks to satisfy his lust; if it fails, then anger and greed arise. This is why the sane man who does not want to fall into the demonic species must try to get rid of these three enemies capable of “killing”, of suffocating the soul, to the point of depriving it of all chance to break free from the trappings of material existence.
Sexual life is at the origin of material slavery, because it forces the soul to reincarnate, and prevents its entry into the spiritual world. This is why the Lord advises us abstinence, especially if we want to put an end to the cycle of reincarnations, and enter into his eternal kingdom.