The wise ones cross the ocean of death by Avidya and attain immortality through Vidya.

He who knows both vidya and avidya together crosses by avidya and obtains immortality by vidya. Work on the subtle and work on the gross. You know consciousness is everything but knowing that consciousness is everything you cannot eat everything. 

For your physical wellbeing you have to be discreet in what you eat, what is good for the body and what is not. You can't say, "All this is Brahman, all this is consciousness. All this is part of me anyways. Let me eat anything that I want." It doesn't work that way. That discrimination has to be there. 

Unfortunately, this advaita knowledge has been misunderstood and misused by many people. You will see people just lying down anywhere and say "Everything is the same, all is Brahman." Good, but they have not understood the very basic. 

They don't bother to clean or cut their nails. “All is Brahman, what is there? Anyways we are going to die one day”. In the name of advaita they are torturing one's body. If you go to Kumbh Mela, you will see people putting fire all over their body, head, hands, sitting ding tapas. The Upanishads do not agree with such things. 

The scriptures do not give sanction to such practices. Someone says so - and - so is a very great Saint. What does he do? He is standing on one leg for 30 years. What did he get by standing on one leg for so long? Torturing one's body is not advaita. It's not Vedanta. 

Sitting and doing Puja from morning till night, chanting the whole time is also not Vedanta. Rituals and ceremonies have their importance. They create certain subtle vibrations, subtle energy. They are the means to work on the subtle level. But not that one is totally immersed in it day and night and not taking care of anything else. The wise ones cross the ocean of death by Avidya and attain immortality through Vidya.