When a man has reached the point where he can sit in meditation for six months, there is no need of eating, no need of latrine or of rest. Only one drop of amrit nectar from the top of the head to the body keeps him alive. If a tiger eats that body there is no care, but only when the life comes back to the body will there be pain.
Saints did Jap (japa) and Sadhana for 10,000 years… only then they could succeed in Jap, Meditation and Yoga. But people want to be expert within 5-7 months only.
Meditation is good, one can attain a pure mind by one-pointedness and detachment. Meditate upon one point and you will know God.