Bhagavad Gita 6.17 · Yuktahara Viharasyaयुक्ताहारविहारस्य युक्तचेष्टस्य कर्मसु।युक्तस्वप्नावबोधस्य योगो भवति दुःखहा ॥

In this verse the Lord prescribes for the student of Yoga, diet, recreation and th like. The student of Yoga should always adopt the happy medium or the middle course. Lord Buddha went to the extremes in the beginning in matters of food, drink, etc. He was very abstemious and became extremely weak. He tortured his body very much. Therefore he was not able to attain to success in Yoga. Too much of austerity is not necessary for Selfrealisation. This is condemned by the Lord in chapter XVII, verses 5 and 6. Austerity should not mean selftorture. Then it becomes diabolical. The Buddi Yoga of Krishna is a wise approach to austerity. Some aspirants take asceticism as the goal it is only the means but not the end. The nervous system is extremely,sensitive. It responds even to very slight changes and causes distraction of the mind. It is, therefore, very necessary that you should lead a very regulated and disciplined life and should be moderate in food, sleep and recreation. Take measured food. Sleep and wake up at the prescribed time. Sleeo at 9 or 10 p.m. and get up at 3 or 4 a.m. Only then will you attain to success in Yoga which will kill all sorts or pains and sorrows of this life.