“The type of food you consume decides the degree of concentration you can command; its quality and quantity decide how much your self-control is lessened or heightened. Polluted air and water are full of maleficent viruses and germs and have to be avoided at all costs. There are four pollutions against which man has to be vigilant - of the body (removable by water); of the mind (removable by truthfulness), of reason (removable by correct knowledge) and of the self (removable by yearning for God). "Vaidhyo Narayano Harih", the Shruthis declare. God is the Doctor. Seek Him, rely on Him, you will be free from Disease.”

... Sathya Sai Baba, “Food and health” Discourse, 21 September 1979     http://www.sssbpt.info/ssspeaks/volume14/sss14-31.pdf

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“We require today those who take delight in selfless service, but such men are rarely seen. You who belong to the Sathya Sai Seva Organisation, every one of you, must become a sevak, eager to help those who need it. When the sevak (helper) becomes the nayak (leader) the world will prosper. Only a kinkara (servant) can grow into a Shankara (Master). Of course, one has to eliminate the ego totally. Even a trace of it will bring disaster. However long you may do dhyana, however constant your japa, a little ego will render them barren of results. Bhajan done with egoistic pride will be as harsh as the crow's caw. So, try to avoid the ego marring your sadhana, even to a small extent.”

... Sathya Sai Baba, “Lessons on seva sadhana” Discourse, 19 November 1981   http://www.sssbpt.info/ssspeaks/volume15/sss15-31.pdf