You need to develop physical strength, for which balanced food is necessary. You can eat rice and chapati. You should develop mental strength to drive away negative thoughts. When you have mental strength, you can remain unperturbed in the face of difficulties and sorrows…When you develop physical and mental strength, your spiritual strength will also improve. When you follow the path of spirituality, you will be free from all doubts and delusions. It is the wrong food that gives rise to evil tendencies like anger, lust, and tension and causes all problems. Therefore, it is necessary that you should always eat only pure (sattvic) food.

...Sathya Sai Baba, “Supreme Bliss Comes From Absolute Wisdom” Discourse 1 September 1996                             http://sssbpt.info/ssspeaks/volume29/d960901.pdf

Offer services and receive love." This is the recipe for experiencing Divinity. But today service is not offered wholeheartedly. Few render service with love and hence few receive God's grace. Even their love is self-centred and is not all-embracing. Our love should not be confined to our kith and kin. It must extend beyond the family to society as a whole, then to the nation at large, and finally embrace the whole world.

…Sathya Sai Baba, “Born to Serve” Discourse, 19 November 1987                                                                             http://www.sssbpt.info/ssspeaks/volume20/sss20-26.pdf