So Once your soul is sufficiently purified. No longer craving material things.
It can then go into samadhi. Staying in self consciousness.
However with force of past habit the material things crop up again. Although not binding
So one must make Meditation a habit. Meditate for hours and days together. Till it is national. This of course takes decades to get there
So those who can go to samadhi generally leave and stay alone for a while and then when they emerge they can never fail or fall
Such people are rare
Vivekananda did it
Ramkrishna did it
Ramana maharshi did it
Lahiri mahashay did it
It is a must. But first develop the habit of going into samadhi easily
Bhavin