How to go to the spiritual world, which leads us there?

Only the spiritual body allows the soul to enter the kingdom of God.

When the purified holy being is ready, what is commonly called death occurs, but which is ultimately only a sudden change of body. A pure soul sees at the moment of death, the annihilation of its two bodies, that of dense matter and the ethereal body in which the soul is enclosed.

At the moment of death, the spiritual fire burns the gross material body, and if one no longer feels the desire for material enjoyment, the ethereal body is also annihilated. Only the pure soul then remains. She then obtains a spiritual body thanks to which she will enter the kingdom of God. He who frees himself from the chains that held him in these two material bodies, that of dense matter and the ethereal, and remains in the state of pure soul, returns to God, in his original home located in the spiritual world or kingdom of Lord Krishna, to enter the service of Krishna.

For the pure sage, this change is compared to lightning, which is simultaneously accompanied by bright light. By the supreme will he develops a spiritual body at the very moment he leaves the material body.

It should be noted, however, that even before death, the pure sage is freed from all material attachment, and because of his constant contact with Lord Krishna he possesses an entirely spiritualized body.

Now he or she who obtains to regain the spiritual world, abandons his two material bodies, the fleshly envelope and the ethereal proper to the material universe, and returns there to his pure spiritual body, and there is assigned a fixed place of residence, on one of the countless spiritual planets.

Those who desire to live in the company of God, the Supreme Person, in his transcendental form of Narayana, the full emanation of Krishna on the spiritual planets, where in his primordial form of Krishna on the supreme planet Krishnaloka, join these mansions, from which they never return to the material universe.

It is in the kingdom of Krishna, God, the Supreme Person, that the soul receives its spiritual body. The holy beings, the devotees, the sages admitted to the kingdom of God, each get a body of eternity, knowledge and bliss.

Lord Krishna says: “After leaving his body, the holy servant no longer receives a material body, but returns to the kingdom of God, where he receives a spiritual body similar to that of the Lord's eternal companions whose example he was following.”